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GB 50688-2011

Chinese Standard: 'GB 50688-2011'
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BASIC DATA
Standard ID GB 50688-2011 (GB50688-2011)
Description (Translated English) Code for design of urban road traffic facility [Quasi-Official / Academic version - scanned PDF, translated by Standard Committee / Research Institute in China]
Sector / Industry National Standard
Classification of Chinese Standard P66
Classification of International Standard 93.080.01
Word Count Estimation 124,116
Date of Issue 2011-05-12
Date of Implementation 2012-05-01
Quoted Standard GBJ 124; GB 50220; GB 1589; GB 5768; GB/T 18833; GB 3096; GB/T 23827; GB 14886; CJJ 37; CJJ 11-1993; CJJ 69; CJJ 129; CJJ 45; JGJ 50; JTG D70; JTG D60; JTG D81; JT/T 431; HJ/T 90; SZ-C-B03-2007
Drafting Organization Shanghai Municipal Engineering Design Institute (Group)Co., Ltd.
Administrative Organization Shanghai Municipal Engineering Design Institute (Group) Co., Ltd.
Regulation (derived from) Bulletin of the Ministry of Housing and Urban No. 1034
Summary This Chinese standard applies to urban construction, reconstruction, expansion of road traffic facilities located a design. Urban road transport facilities should include traffic signs, traffic markings, protective facilities, traffic lights, traffic monitoring systems, services and facilities, road lighting and power distribution and management of premises and equipment.

GB 50688-2011
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
UDC
P GB 50688-2011
Code for Design of Urban Road Traffic Facility
城市道路交通设施设计规范
ISSUED ON: MAY 12, 2011
IMPLEMENTED ON: MAY 1, 2011
Jointly issued by: Ministry of Housing and Urban-Rural Development of
the People's Republic of China;
General Administration of Quality Supervision,
Inspection and Quarantine of the People's Republic of
China.
Table of Contents
Foreword ... 4
1 General Provisions ... 9
2 Terms and Symbols ... 10
2.1 Terms ... 10
2.2 Symbols ... 12
2.3 Designation ... 13
3 Traffic Survey ... 14
4 Overall Design ... 15
4.1 General Requirements ... 15
4.2 Grading of Traffic Facility ... 15
4.3 Overall Design Requirements ... 16
4.4 Design Interface ... 17
5 Traffic Signs ... 19
5.1 General Requirements ... 19
5.2 Classification and Arrangement ... 19
5.3 Layout Design... 20
5.4 Material ... 22
5.5 Supporting Mode and Structure Design ... 23
6 Traffic Marking ... 24
6.1 General Requirements ... 24
6.2 Marking Arrangement ... 24
6.3 Material ... 26
6.4 Delineator ... 26
7 Protection Facilities ... 28
7.1 General Requirements ... 28
7.2 Crash Guardrail ... 28
7.3 Crash Cushion ... 32
7.4 Delimitation Structure of Collision Protection Facility ... 34
7.5 Pedestrian Guardrail ... 34
7.6 Separate Facility ... 36
7.7 Guard Fence and Anti-fall Net ... 37
7.8 Anti-glare Facility ... 38
7.9 Acoustic Barrier ... 38
8 Traffic Signal Lamp ... 39
8.1 General Requirements ... 39
8.2 Arrangement of Signal Lamp ... 39
8.3 Traffic Signal Control System ... 40
9 Traffic Surveillance and control System ... 41
9.1 General Requirements ... 41
9.2 Management Mode ... 42
9.3 Traffic Surveillance and control Center ... 42
9.4 Message Collection Facility ... 43
9.5 Message Display and Control Facility ... 43
9.6 Message Transmission Network ... 44
9.7 System Link and Safety ... 44
9.8 Main Performance Index of Surveillance and control System ... 45
9.9 Foundation and Piping of Out-field Equipment, Power Supply, Lightning Protection and
Earthing ... 45
9.10 Service Message Facility ... 46
9.11 Changeable Message Sign ... 46
10 Service Facility ... 48
10.1 General Requirements ... 48
10.2 Pedestrian Guide Facility ... 48
10.3 Pedestrian Crossing Facility ... 49
10.4 Parking Facility for Non-motor Vehicle ... 51
10.5 Parking Facilities for Motor Vehicle ... 52
10.6 Bus Stop ... 53
11 Road Lighting and Power Transformation and Distribution ... 56
11.1 Road Lighting ... 56
11.2 Lighting Control ... 59
11.3 Power Transformation and Distribution System ... 59
11.4 Energy Conservation ... 60
12 Management Office and Equipment ... 62
12.1 General Requirements ... 62
12.2 Management Office ... 62
12.3 Management Equipment ... 63
Explanation of Wording in This Code ... 64
List of Quoted Standards ... 65
1 General Provisions
1.0.1 With a view to maintaining order operation, security, smoothness and low
public nuisance of urban road traffic, unifying technical standards of urban road
traffic facility design, guiding engineering construction, and achieving
comprehensive function of urban road traffic facility, security and practical
advanced technology as well as economy and rationality, this code was
formulated.
1.0.2 This code is applicable to design of traffic facilities for constructed,
renovated and extended roads. Urban road traffic facilities shall include traffic
signs, traffic markings, protection facilities, traffic signal lamps, traffic
surveillance and control systems, service facilities, road lighting and power
transformation and distribution as well as management offices and equipment.
1.0.3 Urban road traffic facility shall be designed according to road nature,
environment along the line and traffic flow characteristics; and in addition, it
shall meet the requirements of relevant planning, overall design of road and
energy conservation and environmental protection in the project location area.
1.0.4 The overall dimensions and load of the design vehicle adopted in the
urban road traffic facility design shall meet the requirements of the current
national standard "Limits of Dimensions, Axle load and Masses for Road
Vehicles" (GB 1589).
1.0.5 The urban road traffic facility shall be designed synchronously with the
principal part of the road engineering; and the design is carried out according
to the principles of overall design and phased implementation. For the relevant
foundation engineering and piping of the principal part of the engineering, they
shall be reserved and embedded during implementation of the principal part of
the engineering.
1.0.6 The urban road traffic facility design shall meet the requirements of this
code as well as those specified in the current national standards.
2 Terms and Symbols
2.1 Terms
2.1.1 Right of way
Right of road user to carry out traffic activities in certain space at certain time
according to the requirements of traffic laws and regulations.
2.1.2 Warning sign
The sign used to warn the vehicles and pedestrians for noticing the road traffic.
2.1.3 Prohibition sign
The sign for prohibit or restrict traffic of vehicles and pedestrians.
2.1.4 Mandatory sign
The sign used to direct vehicles and pedestrians.
2.1.5 Guide sign
The sign used to deliver message on road direction, place and distance.
2.1.6 Changeable message sign
Changeable message sign can change its displayed content according to the
change of traffic, road and climate.
2.1.7 Active luminous sign
The sign with figures and symbols and can give out light from inside through
electric energy or other energy resources; under relatively dark environment, it
can be clearly identified.
2.1.8 Retro-reflection
The reflection which the reflecting light reflects from the opposite direction near
the opposite direction and returns to the light source.
2.1.9 Delineator
It is used for indicating heading direction of the road and the edge contour, and
is designed with retro-reflection characteristics or initiative lighting function.
2.1.10 Roadside clear zone
2.1.20 Delimitation structure
Major structure surrounding clearance of carriage way.
2.1.21 Collision protection facilities for main structure
Collision protection member enhanced on the major structure easy to be
collided.
2.1.22 Collision protection facilities for subsidiary structure
Collision protection facility arranged independently ahead of the major structure
easy to be collided for protecting the major structure.
2.1.23 Guard fence
Fence arranged for preventing pedestrians and non-motor vehicles from
entering into the expressway, ramp or other prohibited area.
2.1.24 Acoustic barrier
A specially designed acoustical baffle placed between the noise source and the
sound receiving point.
2.1.25 Traffic surveillance and control
A kind of technical measure for operation and management of road traffic
provided for the traffic manager through collection, treatment and launching of
traffic message.
2.2 Symbols
Eav - average illuminance
Emin - minimum illuminance
Evmin - minimum vertical illuminance
SR - surround ratio
TI - increase of glare limitation value
UE - uniformity of illuminance
UL - longitudinal uniformity of luminance
UO - overall uniformity of luminance
3 Traffic Survey
3.0.1 Traffic survey shall be carried out for urban road traffic facility design.
3.0.2 Traffic survey content shall cover the road network state in the location
area, the current state of land use along the line, the environment along the line,
the road and traffic conditions, the urban planning and the road network
planning. Except the design road itself, the surrounding area having effect on
the design road shall also be covered.
3.0.3 The following conditions shall be analyzed on the basis of investigation
and data collection in design of constructed road traffic facilities:
1 Social economy, traffic development, topography, climate and weather in
the located area of the project as well as the land development and utilization
conditions along the line of the project;
2 Relevant surrounding road grade, alignment, cross section arrangement
and traffic facility arrangement conditions;
3 Main road traffic characteristics, traffic organization and management
situation surround the project;
4 Status, function and road grade of the project in the planning of road
network;
5 Forecast traffic volume, traffic organization and traffic characteristics of
the project.
3.0.4 For design and investigation content of traffic facilities in renovated and
extended road engineering, except the information required by the new
engineering, the following contents shall also be supplemented in case of need:
1 Conditions of the existing road traffic facilities;
2 Conditions of the existing road traffic;
3.0.5 In renovation engineering design of road traffic facilities, the information
such as the existing geometric conditions of road, traffic volume, composition,
flow characteristics and accident shall be analyzed comprehensively; and
moreover, the predicted traffic information shall be analyzed and judged.
4 Overall Design
4.1 General Requirements
4.1.1 Overall design of the urban road traffic facility shall meet the requirements
of the overall objectives such as security, smoothness, environment protection
and sustainable development.
4.1.2 Overall design of the urban road traffic facility shall coordinate with the
design of the principal part of the road engineering, according to road function
and its function in the urban road network, the factors such as design, work,
maintenance, operation, management as well as short-term and long-term are
comprehensively considered so as to exactly embody the intention of the main
design for the road engineering.
4.1.3 Urban road traffic facilities shall not only maintain the respective
characteristics and relative independence, but also match and coordinate with
each other, so that they become a unified, coordinated and complete system
engineering.
4.2 Grading of Traffic Facility
4.2.1 Overall planning and design shall be carried out for urban road traffic
facility design according to the grade.
4.2.2 Grade of urban road traffic facility shall be divided into Grades A, B, C and
D, and shall meet the following requirements:
1 For Grade A facilities, signs, markings, isolation and protection facilities
with improved system shall be arranged; central separate crash guardrail and
necessary anti-glare facility must be arranged continuously in the central strip;
and crash guardrail must be arranged at roadside for bridge, high embankment
as well as road section with side road and side walk beside which may
endanger life and structure safety after crash; signs for guiding and prohibition
shall be arranged continuously for the grade-separated junction and the
surrounding road network; delineator shall be arranged continuously on both
sides of main road and ramp carriage way; branching triangle end at exit shall
be provided with eye-catching warning and collision protection facility; ramp
control signal lamp shall be arranged for actually controlled ramp; the traffic
surveillance and control system shall be arranged in accordance with Grade II;
and the medium-long, long and super-long tunnels shall be arranged in
accordance with Grade I;
2 For Grade B facilities, improved signs, markings, as well as necessary
isolation and isolation and protection facilities shall be arranged; road section
4.3.2 The interface and joint between the overall design and the principal part
of the engineering design shall be defined, and moreover, the specialized
design interface and joint of urban road traffic are coordinated so as to avoid
interference among facilities.
4.3.3 In the overall design, professional traffic facility design plan shall be
developed by organizing traffic facilities, the connection and assistance
between facilities are coordinated.
4.3.4 For the overall design, the road traffic facility design plan shall be
optimized and perfected according to the road service level of principal part of
the engineering design and security assessment conclusion.
4.3.5 Functional requirements on evacuation, salvage and rescue under special
traffic safety or emergency occasions shall be proposed in the overall design.
4.4 Design Interface
4.4.1 When traffic signs, delineators, protection facilities, traffic signal and
monitor system field equipment, lighting and power transformation and
distribution facilities are arranged on road structure or bridge, tunnel structure,
the designer of the traffic facilities shall provide the arrangement stake No.,
reserved hole size, structural gravity and load-carrying conditions; the design
of embedment and reserve shall be carried out by the designer of the principal
part of the engineering while he is designing the structure or bridge and tunnel
structure. The arrangement and installation of traffic facilities are designed by
the designer of traffic facilities.
4.4.2 When protection facilities with crash requirements are arranged on road
structure or bridge, tunnel structure, crash grade, geometric size and structure
design of collision protection facility as well as design for rigid-soft collision
protection transition section at structure end shall be provided with by the
designer of traffic facilities; the designer of the principal part of the engineering
shall carry out the design of road structure or bridge and tunnel structure.
4.4.3 Communication and signal system piping embedded in road subgrade
cross section shall be determined by the designers of traffic facilities and
principal part of the engineering and layout position of the piping is determined
by the design of the traffic facility designer; the principal part of the engineering
designer shall indicate the sizes and positions of reserved piping, manhole and
tube-box in the relevant design drawing, and they shall be listed in the design
document of the principal part of the engineering.
4.4.4 Service facilities such as taxicab, bus station, pedestrian crossing facility
are covered in the design of principal part of the engineering, and their positions,
scales and sizes shall be proposed by the traffic facility designer, after
5 Traffic Signs
5.1 General Requirements
5.1.1 Design of traffic signs shall be in accordance with the relevant laws and
regulations of road traffic management and traffic organization management
plans, and concisely and accurately deliver message such as right of way, rules
of road as well as route indication to road users; and guarantee traffic
smoothness and travel safety.
5.1.2 Message delivered by other management facilities such as traffic signs
and traffic markings shall be consistent and supplement each other.
5.1.3 Traffic signs shall not deliver message irrelevant with road traffic.
5.1.4 Mandatory signs for emergency, fire protection and risk prevention in
tunnel shall be active luminous signs or illuminated signs.
5.1.5 Traffic signs shall not intrude into delimitation of road construction.
5.2 Classification and Arrangement
5.2.1 According to the function, traffic signs shall be divided into main one and
auxiliary one, the former one covers warning sign, prohibition sign, mandatory
sign, guide sign, tourist area sign, operating area sign and announcement sign;
the auxiliary sign is attached under the latter one for giving auxiliary description.
5.2.2 According to the display mode of layout content, traffic signs shall be
divided into static ones and changeable message ones.
5.2.3 Arrangement of traffic signs shall meet the following requirements:
1 Factors such as urban scale, characteristics, road network facility layout,
road grade, geometric conditions, traffic conditions, road user demands,
environment and climate shall be considered comprehensively;
2 Traffic laws and safety requirements shall come first in arrangement of
signs;
3 Message display of sign shall be explicit, continuous and systematic, the
phenomena of insufficient or overloading message shall be avoided; and what's
more, important message shall be displayed in repetition;
4 Under dynamic condition, legibility of road user shall be given full
consideration, namely the time and advance range necessary for users to find
and read signs and then take action under that condition;
5.4.2 Grades 1 ~ 3 reflective films shall be adopted for signs on urban
expressway and urban arterial road; and on curve section or other danger road
sections, reflective film above Grade 2 is adopted. Reflective film above Grade
4 shall be adopted for signs on urban secondary trunk road and roads of lower
grade.
5.4.3 Underplate and supporting structure of sign should be made of light
material and structure, and meet the requirements of strength, rigidity, durability
and corrosion resistance.
5.4.4 Display mode and material for board of changeable message sign shall
be selected according to requirements of type, content displayed, control mode,
environmental protection and energy conservation on signs.
5.5 Supporting Mode and Structure Design
5.5.1 According to requirements of importance of message that the sign
delivers, layout size, traffic volume lane number, designed wind speed,
roadside conditions and suspension position, sign board may be adopted with
supporting modes such as column type, cantilever type, frame type or adhesion
type.
5.5.2 Design for supporting structure of sign shall be sorted according to
supporting mode and board surface size of the sign. The upper structure, post,
transom and the connection are designed, and moreover, the deformation and
strength are calculated and checked respectively; for the substructure, its
design of strength, overturning resistance and anti-sliding are calculated and
checked, so is the base stress.
5.5.3 In wind load calculation, the designed wind speed shall meet the following
requirements:
1 The 50-year 10 min calculated mean maximum wind speed at place 10
m higher than the flat open area in the location area of the sign shall be adopted;
2 When it is lack of observation data of wind speed, the designed wind
speed may be in accordance with the "profile for the National reference wind
speed and the reference wind speed", the speed will be adopted after
verification in field survey; however, it shall be not less than 22 m/s.
3 Connection between the sign board and the supporting structure shall be
firm and reliable with convenient installation, flat and smooth board surface and
easy maintenance.
6 Traffic Marking
6.1 General Requirements
6.1.1 Marking shall meet the functional requirements of road usage, and deliver
relevant rule, warning and guideline to road users.
6.1.2 Marking may be used in conjunction with the sign or used exclusively.
6.1.3 Marking shall be able to be identified clearly, and meet the requirements
of legibility in daytime, rain day and nighttime. Urban expressway and arterial
road shall be arranged with reflective traffic markings.
6.2 Marking Arrangement
6.2.1 Traffic markings of general road section of monitor shall meet the following
requirements:
1 For urban motor vehicle road of two-way traffic, yellow divisional line for
carriage way of opposite direction shall be drawn between lanes for driving of
opposite direction;
2 For urban expressway, carriage way edge line shall be drawn at outer
side edge (inner side of marginal strip) of motor lane; for road of other grades,
carriage way edge line should be drawn at the outer side edge (inner side of
the marginal strip) of the motor lane;
3 For road section on which motor vehicle and non-motor vehicle travel
separately, carriage way edge line (divisional line of motor vehicle and non-
motor vehicle) shall be drawn at the division of motor vehicle lane and non-
motor vehicle lane;
4 Arrangement of crosswalk line shall be determined according to the
factors such as road grade, pedestrian traversing demands and traffic safety;
5 Marking width shall be determined according to road grade, design speed
and width of pavement, and moreover, it shall meet the requirements specified
in Table 6.2.1.
turning is equipped with and accommodation lane for left-turning is provided
with; however, it shall not hinder the normal straight traveling of vehicle at the
opposite direction.
3 On occasions that the at-grade intersection is overlarge and irregular and
the traffic organization is complex, and when it is hard for vehicles to find exit
lanes, guide line shall be arranged at the junction to assist traveling and turning
of vehicles.
4 For over wide and irregular junction or with relatively complex traveling
conditions, ramp entrance or other special place of grade-separated junction,
guide line shall be arranged, and it shall be designed according to topography,
traffic flow and the flow direction at the junction.
5 Entrance/exit marking and guide arrow shall be arranged for branch
section and merging section of grade-separated junction. Arranged size and
repeated arranged time of guide arrow shall be selected according to those
specified in Table 6.2.3. For junction with irregular turning order at entrance lane,
repeated arranged time of the guide arrow should be increased.
Table 6.2.3 -- Arranged Size and Repeated Arranged Time of Guide Arrow
at Entrance/Exit
Design speed (km/h) 100 80, 60, 50 40, 30, 20
Length of guide arrow (m) 9 6 3
Repeated arranged time ≥ 3 3 ≥ 2
6.3 Material
6.3.1 The material shall be durable, abrasion and corrosion resistant, and
strongly bonded with the pavement, and moreover, be equipped with favorable
identification and anti-slip performance.
6.3.2 Urban expressway and arterial road shall be adopted with reflective
marking. Luminance factor of white reflective marking paints shall be greater
than or equal to 0.35, and their initial retro-reflection coefficient shall be greater
than or equal to 150 mcd • 1x-1 • m-2; that of yellow ones shall be greater than
or equal to 0.27 and their initial retro-reflection coefficient shall be greater than
or equal to 100 mcd • 1x-1 • m-2.
6.3.3 Marking shall be adopted with environmental protection material, and it
shall not pollute the surrounding environment and harm the construction
personnel.
6.4 Delineator
6.4.1 Arrangement of delineator shall meet the following requirements:
7 Protection Facilities
7.1 General Requirements
7.1.1 Protection facilities shall be adopted with environmental protection
material and convenient for installation and repair.
7.1.2 Protection facilities shall not intrude into delimitation of road
construction as well as the range of stopping sight distance.
7.1.3 For expressway roadside which is not provided with sufficient clear
distance, crash guardrail must be arranged; where width for integral
cross-section central strip of subgrade is less than or equal to 12 m, crash
guardrail must be arranged continuously for median divider of
expressway.
7.1.4 Protection facilities should be concise and generous and coordinate with
design style of road, bridge and surrounding building.
7.2 Crash Guardrail
7.2.1 Crash grade and key technical indexes of crash guardrail shall be in
accordance with those specified in Table 7.2.1.
Table 7.2.1 -- Crash Grade and Key Technical Indexes of Crash Guardrail
Crash grade Crash condition
Roadside
guardrail
Median
barrier Crash vehicle
Vehicle
mass (t)
Crash speed
(km/h)
Crash
angle (°)
Crash
energy (kJ)
B Bm
Small
passenger
car
1.5 80 20 —
Large
passenger
car
10 40 20 70
A Am
Small
passenger
car
1.5 100 20 —
Large
passenger
car
10 60 20 160
SB SBm
Small
passenger
car
1.5 100 20 —
2 Roadside of arterial road should be arranged with crash guardrail. Crash
grade of roadside guardrail on the arterial road shall meet the requirements of
Table 7.2.4-2;
Table 7.2.4-2 -- Application Conditions for Crash Grade of Arterial Road
Roadside Guardrail
Application conditions Design speed (km/h) 60, 50 40
General road section and ramp B —
High slope, bridge approach, connecting line of tunnel opening and road
section near structure A B
High steep slope, high retaining wall, road section near river and that on which
severe accident may take place when vehicle runs out of it. SB A
Road section near adjacent to other expressway and people flow concentrated
area and that on which severe secondary accident may take place when
vehicle runs out of it.
SA SB
3 Roadsides of secondary trunk road and branch road are generally not
arranged with roadside guardrail. For road section on which severe accident or
severe secondary accident may take place when vehicle runs out of it, crash
guardrail should be arranged. Crash grade for crash guardrails on roadsides of
secondary trunk road and branch road is arranged by reference to the arterial
road.
4 For road sections such as trunk line railway, reservoir, oil depot, power
plant which require special protection, their crash guardrails shall be specially
designed.
7.2.5 Arrangement of median barrier shall meet the following requirements:
1 Crash grade of expressway median barrier shall meet the requirements
of Table 7.2.5-1;
Table 7.2.4-1 -- Application Conditions for Crash grade of Expressway
Median Barrier
Application conditions Design speed (km/h) 100 80 60
General road section SBm Am Bm
Particularly protected road section such as ramp turn with small radius,
median divider with pier and other structure SAm SBm Am
2 Median divider of arterial road whose design speed is greater than or
equal to 50km/h should be arranged with crash guardrail. Crash grade of the
median barrier on the arterial road shall meet the requirements of Table 7.2.5-
2.
to secondary trunk road, branch road or people flow concentrated
area.
Height of the bridge is greater than 20 m, or the bridge crosses
or is adjacent to arterial road or expressway. SS SA SB
3 Crash grade for guardrail of secondary trunk road, branch road bridge
and culvert may be selected according to the criteria of arterial road with 40km/h
design speed in Table 7.2.7.
4 For road sections which are adjacent to or cross trunk line railway,
reservoir, oil depot, power plant and require special protection, their bridge
guardrail shall be specially designed and reasonable crash condition shall be
determined;
5 Small bridge, culvert and channel of expressway and arterial road shall
be arranged with crash guardrail with type the same as that of the subgrade
section.
7.2.8 Safety treatment shall be carried out for the beginning and ending of the
crash guardrail.
7.2.9 Transition section shall be arranged for conjunction of crash guardrail with
crash guardrails of different structure types or rigidity, so that rigidity of guardrail
can transit gradually thus forming an integrity.
7.3 Crash Cushion
7.3.1 Crash grade of crash cushion shall be divided into 3 grades, and the key
technical indexes for each grade shall be in accordance with those specified in
Table 7.3.1.
Table 7.3.1 -- Crash Grade of Crash Cushion
Crash cushion type Crash grade
Crash condition
Crash
type Crash vehicle
Crash
mass
(t)
Crash
speed
(km/h)
Crash
angle
(°)
Non-redirective crash
cushion
B50
Direct
crash Small
passenger car 1.5 50
Oblique
crash 15
B65
Direct
crash Small
passenger car 1.5 65
Oblique
crash 15
7.4 Delimitation Structure of Collision Protection Facility
7.4.1 During traveling, it is easy for vehicle to run out of the delimitation to
collide on the bridge pier stud, main beam, both ends and top of tunnel opening
entrance, as well as traffic sign supporting structure, therefore, delimitation
facility shall be arranged at the delimitation structure.
7.4.2 For collision protection of delimitation structure at top side of the road,
collision protection facilities such as crash cushion, crash island, crash bearer
and those for strengthening collision protection of pier stud may be arranged
before the road; for that of delimitation structure at side face, crash guardrail
may be arranged and strengthened at the roadside; and that of delimitation
structure at the top surface, collision protection structure and warning and
delimitation signs may be arranged.
7.4.3 When position of combined or concrete wall crash guardrail arranged at
the roadside overlaps with that of the delimitation structure, if the delimitation
structure itself can meet the crash requirements, integral delimitation structure
collision protection which is constructed through combining delimitation
structure may be adopted, and moreover, the section shape of the crash side
is consistent with the original crash guardrail.
7.4.4 Corrugated beam as crash guardrail is arranged at roadside, where
deformation of the corrugated beam fails to meet the requirements for
protecting the delimitation structures on both sides, guardrail post with densed
spacing or crash guardrail facility with level higher than Grade SB of highway.
7.4.5 When no delimitation structure of crash guardrail is arranged at side face
of road, crash cushion, crash island and crash bearer should be arranged at
the front crash side.
7.4.6 Delimitation collision protection at top surface may be adopted with
collision protection facilities for main structure, auxiliary collision protection
facility and warning sign as well as delimitation sign.
7.4.7 Design for collision protection facility of delimitation structure shall be in
accordance with the principles of security, economy, duration and be
convenient for maintenance, the appearance shall be concise, and
simultaneously, warning marks which are consistent with the design style of the
road, bridge and surrounding urban landscape and building shall be arranged.
7.5 Pedestrian Guardrail
7.5.1 The following positions shall be arranged with pedestrian guardrail:
1 Pedestrian guardrail shall be arranged for places with height difference
the motor vehicle lane.
7.6 Separate Facility
7.6.1 Separate facilities shall be arranged for the following positions:
1 For road with two-way six-lane or above, when there is no median divider
and crash guardrail, clear height of rail should be greater than or equal to 1.10
m; at fracture section crossing by pedestrian, height of the guardrail shall be
reduced gradually and it shall not be greater than 0.70 m, the reduced length
shall be greater than or equal to the stopping sight distance; separate column
shall be arranged at fracture section;
2 For road with two-way four-lane or above, motor vehicle lane and non-
motor vehicle lane are of one-roadway design, and moreover, separate rail shall
be arranged between the motor vehicle lane and the non-motor vehicle lane;
3 When non-motor vehicle flow reaches a saturation or motor vehicle
randomly parks by the roadside, motor vehicle lane and non-motor vehicle lane
are of a one-roadway cross-section, and separate rail should be arranged
between the motor vehicle lane and the non-motor vehicle lane;
4 If motor vehicle lane and non-motor vehicle lane share one cross-section,
separate rail for non-motor vehicle and motor vehicle should be arranged within
the functional area at the junction; when the cross-section is arranged at the
junction, it shall be avoided that after the separate rail is arranged, the traveling
of vehicle turning and turning around shall not be hindered;
5 When non-motor vehicle lane and sidewalk share one cross-section,
separate rail should be arranged between the non-motor vehicle lane and the
sidewalk;
6 When non-motor vehicle lane is higher than the ground at the side, and
there is falling risk, separate rail shall be arranged beside the non-motor vehicle
lane;
7 According to conditions, separate rail may be arranged between the
sidewalk and the green space;
8 Separate rail may be arranged for positions needing functional zoning
between the sidewalk and the parking lot and facility belt;
9 Separate column may be arranged at sidewalk edge of junction and edge
of pedestrian gathering place.
7.6.2 Design of separate facility shall meet the following requirements:
7.8 Anti-glare Facility
7.8.1 Median divider of urban expressway shall be arranged with anti-glare
facilities, however, when width of the divider is greater than 9 m, or the height
difference between the two-way pavements is greater than 2 m, such facilities
may not be arranged.
7.8.2 Design of anti-glare facility shall meet the following requirements:
1 Anti-glare facility may be selected with plant anti-glare, anti-glare board
and anti-glare network according to climate conditions, landscape conditions
and light-blocking requirements of road;
2 Design of anti-glare board shall be carried out according to partial light-
blocking principle, the cutoff angle of straight road section shall be greater than
or equal to 8°, and of horizontal and vertical curve road section shall be between
8° ~ 15°, the width should be between 8 ~ 15 cm, and the ground clearance
should be between 120 ~ 180 cm.
7.8.3 Structure design of anti-glare facility shall meet the following requirements:
1 Structures of anti-glare board and anti-glare network shall be convenient
for installation and maintenance;
2 Transition section whose length should be 50 m shall be arranged when
height, structure type and layout position of anti-glare facility change;
3 it shall be avoided that any fracture is remained between anti-glare
facilities.
7.9 Acoustic Barrier
7.9.1 When result of the acoustic environment evaluation according to the
current national standard "Environmental Quality Standards for Noise" (GB
3096) fails to meet the standard, acoustic barrier shall be arranged for the road
section when it still fails to meet the requirements after noise reduction
measures are taken.
7.9.2 The optimum position of acoustic barrier shall be arranged according to
the relative position between the road and the protection object and the
surrounding landform.
7.9.3 Structure design of acoustic barrier shall meet not only the requirements
of the current national standard "Norm on Acoustical Design and Measurement
of Noise Barriers" (HJ/T 90), but also those of structure deadweight and wind
load.
9 Traffic Surveillance and control System
9.1 General Requirements
9.1.1 With a view to improving urban road traffic management service level,
traffic surveillance and control system should be arranged.
9.1.2 Traffic surveillance and control system shall consist of surveillance and
control center, out-field surveillance and control facility and message
transmission network, and shall be possessed of wholly or partially functions
such as message collection, analysis processing, message display and traffic
control management as well as message exchange and resource sharing with
other message system.
9.1.3 Construction of traffic surveillance and control system shall be in
accordance with the road grade and urban scale, and moreover,
comprehensive consideration shall be given to the development stage of urban
economy as well as traffic volume and traffic management demand, and is shall
meet the requirements of Table 9.1.3.
Table 9.1.3 -- Construction Requirements of Traffic Surveillance and
control System
Urban
scale
Road grade
Urban medium, long
and super-long
tunnel
Urban extra-large
bridge and
expressway
Arterial road and
secondary trunk
road
Branch road
Super-
large
city
Shall be constructed Shall be constructed Shall be constructed
Construction
conditions shall be
reserved
Large
city Shall be constructed
Shall be
constructed
Should be
constructed
Construction
conditions should be
reserved
Medium
-sized
city
Shall be constructed Should be constructed
Construction
conditions should be
reserved
Construction
conditions should be
reserved
Small
city Shall be constructed —
Construction
conditions should be
reserved
Construction
conditions should be
reserved
9.1.4 Unified planning shall be carried out for traffic surveillance and control
system according to the current state of the urban road network as well as
planning and traffic management demands, and it may be implemented by
stage according to the urban traffic conditions and the construction conditions.
abnormal event; aiming at constant and incidental traffic jams, traffic control
scheme and emergency treatment plan as well as appropriate message display
guidance scheme can be generated automatically.
9.4 Message Collection Facility
9.4.1 Message collection facility shall mainly consist of traffic parameter tester,
video camera and weather detector.
9.4.2 For allocation of the equipment for Grade I traffic surveillance and control
system, traffic parameter tester and video camera shall be arranged
continuously in the whole road section, and surveillance and control covering
the whole road section is implemented. Sound emergency alarm facility shall
be arranged in special road section such as urban medium, long and super-
long tunnel.
9.4.3 For allocation of the equipment for Grade II traffic surveillance and control
system, traffic parameter tester and video camera shall be arranged
continuously in the whole road section, and surveillance and control covering
the whole road section is implemented. For flyover with large traffic volume, it
should be covered with ramp access.
9.4.4 For allocation of the equipment for Grade III traffic surveillance and control
system, surveillance and control facilities such as traffic parameter tester , video
camera shall be arranged at important sections such as main road crossing and
flyover.
9.4.5 For allocation of the equipment for Grade IV traffic surveillance and
control system, surveillance and control facility such as video camera may be
arranged at main road crossing as required.
9.4.6 Weather message monitor should be arranged for special section such
as urban extra-large bridge as well as road section on which the traffic may be
threatened by poor meteorological requirements according to climate
characteristics, management demands and overall construction requirements
for traffic weather service system throughout the country.
9.5 Message Display and Control Facility
9.5.1 Message display and control facility shall mainly consist of changeable
message sign, changeable speed limit sign and traffic signal control facility.
9.5.2 Allocation of the equipment for Grade I traffic surveillance and control
system shall be carried out along the road and relevant road section, the system
shall be able to display guidance message, so as to relieve message display
facilities such as changeable message sign and changeable speed limit sign
handling of traffic event shall be developed.
9.7.2 Safety strategy in accordance with the message and application safety
demands shall be developed for system link, and moreover, uniform safety
management platform shall be developed as well.
9.8 Main Performance Index of Surveillance and control System
9.8.1 Main technical performance index collected as traffic message should
cover data detection precision, data collecting cycle and video image quality of
traffic, and shall meet the following requirements:
1 Data detection precision of traffic shall be greater than 85 %;
2 Data collecting cycle shall be adjustable between 10 ~ 60 s;
3 Video image quality shall be greater than or equal to Grade 4 in the 5-
level damage system.
9.8.2 Main technical performance index in message processing should cover
distinguishing and processing response time for traffic state, distinguishing
accuracy of traffic state, false alarm rate of traffic event detection and miss
detection rate, and shall meet the following requirements:
1 Distinguishing and processing response time of traffic state should be
less than or equal to 2 s;
2 Distinguishing accuracy of traffic state shall be greater than 90 %;
3 False alarm rate of traffic event detection shall be less than 20 %, so is
the miss detection rate.
9.8.3 Transmission technique performance index of traffic message should
cover transmission delay and error rate, and shall meet the following
requirements:
1 Transmission delay between the out-field equipment and the surveillance
and control center shall be less than or equal to 1 s;
2 Error rate of optical fiber transmission shall be less than or equal to 10-9,
and that of transmission over radio shall be less than or equal to 10-5.
9.9 Foundation and Piping of Out-field Equipment, Power Supply,
Lightning Protection and Earthing
9.9.1 Design for foundation and piping of out-field equipment shall meet the
following requirements:
10 Service Facility
10.1 General Requirements
10.1.1 Pedestrian guide facility, pedestrian crossing facility, non-motor vehicle
parking facility, motor vehicle parking facility and bus stop shall be arranged
according to planning conditions and road layout conditions. The arrangement
of service facility shall be coordinate with the landscape and environment.
10.1.2 Arrangement of service facility shall coordinate with other traffic facilities,
so that they will not disturb each other and their use is not influenced.
10.1.3 Arrangement of service facility shall meet the requirements of accessible
environmental design;
10.2 Pedestrian Guide Facility
10.2.1 Arrangement of pedestrian guide facility shall meet the following
requirements:
1 Pedestrian guide facility and guidepost shall be arranged within the facility
belt, and shall not occupy the effective walking space of pedestrian;
2 Pedestrian guide facility and guidepost shall be planned and arranged
uniformly, so as to be convenient for use.
10.2.2 Arrangement of pedestrian guide facility shall meet the following
requirements:
1 Pedestrian guide facility should be arranged at people flow concentrated
area such as pedestrian street, business district, competition venue, station and
traffic hub as well as road intersection and near public traffic transferring places;
arranged spacing between guide facility on road section shall be between 300
~ 500 m;
2 Content on guide facility shall be explicit and understandable, and with
favorable visibility; it shall not be blocked and the sign surface shall be
maintained clear and tidy;
3 Pedestrian guide facility on junction, square, competition venue and road
surrounding large building shall be arranged in combination with the internal
pedestrian system;
4 Guide facility may be arranged artistically in combination with the
surrounding environment; however, it shall be clear, understandable and easy
to be recognized;
6 For man-car-concentrated area such as business district and traffic hub,
successive spatial crossing facility shall be arranged in combination with the
pedestrian passageway inside the building to form pedestrian vestibule
underground or in the air.
10.3.2 Arrangement of plane crossing facility shall meet the following
requirements:
1 Crosswalk shall be arranged at position easy to be distinguished by
vehicle driver, and it should be vertical to the carriage way;
2 Signal lamp-regulated junction shall be drawn with crosswalk marking,
and corresponding pedestrian signal lamp shall be arranged. Regulated
crossing without signal lamp and give-way regulated crossing shall also be
drawn with crosswalk marking, and moreover, warning sign for giving attention
to pedestrian shall be arranged; on upstream motor vehicle lane of crosswalk,
tag line for indication shall be drawn on crosswalk;
3 When street crossing of opposite angle is adopted for road
intersection, whole green light phase must be arranged for pedestrian
4 Width of crosswalk is related to the quantity of street crossing pedestrian
and the signal display duration, width of the postponed arterial road crosswalk
should be greater than or equal to 5 m, and of others should be greater than or
equal to 3 m, the width is increased or decreased with 1 m as the unit;
5 When inlet and outlet motor vehicle lane of road section or junction is
greater than or equal to 6, or length of crosswalk is greater than 30 m, safety
island shall be arranged, its width should be greater than or equal to 2 m, and
shall be greater than or equal to 1.5 m under difficult conditions;
6 When the pedestrian safety island is provided with median divider, rail-
induced type should be adopted; otherwise inclined open type should be
adopted;
7 Road design for residential area should be adopted with quiet traffic
measures to guarantee safety of pedestrian; and retardation angle,
deceleration strip, bending road section and roundabout shall be arranged for
reducing the speed;
8 Crosswalk adjacent bus station shall be arranged at the vehicle-entering
end of the bus station, and beyond the parking area of bus.
10.3.3 crosswalk signal lamp on road section is arranged according to the
following requirements:
1 Where quantity of two-way motor vehicle lane is greater than or equal to
10.5 Parking Facilities for Motor Vehicle
10.5.1 Arrangement of parking lot for motor vehicle shall meet the following
requirements:
1 Position and scale of public parking lot for motor vehicle shall meet the
urban planning requirements, and constructed by combining the traffic
organization the area parking demands, land and road traffic conditions;
2 Parking lot with certain scale may be arranged for places such as
business district, large sports venue and large building with relatively large
parking demand according to their traffic organization;
3 Length of parking lot entrance and urban road connecting passage shall
meet the requirements of queue length of vehicles approaching the site during
peak hours;
4 Multiple toll gates should be arranged for parking lot with relatively large
vehicle volume; service capacity of the toll gate shall meet the passing in and
out demands of vehicle;
5 vehicle flow line and pedestrian flow line in the parking lot shall be
arranged reasonably and intersecting shall be avoided, pedestrian entrance of
parking lot with large pedestrian volume shall be arranged dispersedly;
6 Internal traffic constitution of the parking lot shall correspond to the
peripheral traffic conditions of the site, traffic sign and marking for pointing
passage and parking space within the site shall be arranged for the
entrance/exit and in the parking lot;
7 Internal walking system of the parking lot shall be connected with its
surrounding walkway; pedestrian flow line should be marked with marking, and
traffic sign and marking shall be arranged when the pedestrian flow line
intersects with the motor vehicle flow line;
8 Entrance/exit of parking lot shall be provided with favorable sighting
conditions, and moreover, traffic sign shall be arranged with.
10.5.2 Arrangement of parking space shall meet the following requirements:
1 As supplement of parking lot, roadside parking space shall be arranged
reasonably;
2 In arrangement of roadside parking space, the effect on normal traffic of
non-motor vehicle shall be avoided, and the space shall not occupy the non-
motor vehicle traffic space;
1 The length of the bus station should not be less than that of 2 parking
spaces. When the station is used by multiple lines of bus, its capacity shall be
applicable to the total traffic of all the lines under the maximum departure
frequency. When the length of the parking space is greater than that of 6
vehicles or the station is shared by more than 6 lines of bus, the station may be
arranged by group and section;
2 The harbor-shaped bus stop shall be adopted on the urban arterial road,
and it should be adopted on the secondary trunk road with large traffic flow; the
bus stop arranged on the expressway shall meet the requirements of the
current professional standard "Specification for Design of Urban Expressway"
(CJJ 129);
3 The paving width of the conventional bus station is determined by the
volume of pedestrians waiting for vehicles. It shall not be less than 2 m under
general condition and 1.5 m under limited conditions. As for the two types of
the BRT station, the width shall not be less than 5 m for the two-side station,
and 3 m for the one side station;
4 For bus station arranged on the main road, the pedestrian crossing
facilities shall be arranged on the side road. The facilities shall be arranged on
the main road as required;
5 As for the mixed traffic section of motor vehicles and non-motor vehicles,
non-motor vehicle lane should be arranged at the outer side of the station;
6 As for the bus station for over 2 bus lines, a pedestrian guardrail should
be arranged for queuing.
10.6.3 The arrangement of bus shelter shall meet the following requirements:
1 The design of the bus shelter shall be safe, practical, economical and
aesthetic, prevent passengers from the blazing sunshine, falling rain and snow,
and harmonize with its surrounding landscape. Seats and leaning posts should
be arranged inside the shelter for passengers’ convenience;
2 Entrance of the bus shelter shall be with good view. The size of the bus
shelter shall be designed according to the requirements. It shall also coordinate
with the station;
3 The arrangement of the stop board shall be convenient for the
observation and search of the bus drivers, stewards and passengers. The stop
boards shall be arranged according to whether bus shelter is available;
4 In the case that the bus station is arranged by group and section, the stop
board shall be arranged inside the corresponding section.
11 Road Lighting and Power Transformation and
Distribution
11.1 Road Lighting
11.1.1 Artificial lighting facilities shall be arranged on the urban road.
11.1.2 There are two types of urban road lighting criteria, respectively motor
vehicle road lighting criterion and non-motor vehicle and sidewalk lighting
criterion. The motor vehicle road lighting criterion shall be divided into three
grades according to expressway and arterial road, secondary trunk road and
branch road.
11.1.3 The evaluation indicators for motor vehicle road lighting shall be the
average pavement luminance (or average pavement illuminance), overall
uniformity and longitudinal uniformity of pavement luminance (or uniformity of
pavement illuminance), glare limitation, ......
Related standard:   GB/T 24970-2020  GB 50422-2017
Related PDF sample:   GB/T 24970-2020
   
 
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