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Rating of early-warning of road traffic under fog weather conditions
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Basic data
| Standard ID | GB/T 31444-2015 (GB/T31444-2015) |
| Description (Translated English) | Rating of early-warning of road traffic under fog weather conditions |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | R85 |
| Classification of International Standard | 03.220.20 |
| Word Count Estimation | 13,125 |
| Date of Issue | 2015-05-15 |
| Date of Implementation | 2015-08-01 |
| Quoted Standard | QX/T 47-2007; QX/T 48-2007 |
| Regulation (derived from) | National Standard Announcement 2015 No. 15 |
| Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China |
| Summary | This Standard specifies the foggy road traffic conditions and alert level partitioning. This Standard applies to the warning level for the fog on the highway network (including highways, primary roads and secondary roads) affect the operation caused by the transport authorities and to determine the meteorological department. Low visibility conditions due to smoke, haze, dust and other weather caused can be implemented by reference. |
GB/T 31444-2015: Rating of early-warning of road traffic under fog weather conditions
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Rating of early-warning of road traffic under fog weather conditions
ICS 03.220.20
R85
National Standards of People's Republic of China
Warning classification foggy highway traffic conditions
Issued on. 2015-05-15
2015-08-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard by the National Traffic engineering facilities (highway) Standardization Technical Committee (SAC/TC223) and focal points.
This standard was drafted. Yunnan Transportation Planning and Design Institute, Research Institute of Highway Ministry of Transport, Public Weather CMA
Service Center.
The main drafters. Zhang Fachun, Tang Jun-jun, Room Rui, Li Great Wall CHANGES OF NON Wu Hao, Tian Hua, Xiao Ling branch.
Warning classification foggy highway traffic conditions
1 Scope
This standard specifies the foggy highway traffic conditions and alert level division method.
This standard applies to transport authorities and meteorological services for the fog on the road network (including highways, highway and secondary public
Effect Road) run to determine the cause warning level. Poor visibility due to smoke, haze, dust and other weather caused can be implemented by reference.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
QX/T 47-2007 surface weather observing practices - Part 3. meteorological observations visibility
QX/T 48-2007 meteorological observation specification - Part 4. weather phenomena observation
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
Warning composite index early-warningcompositeindex
An important indicator of the conditions prevailing fog warning road. Thresholds for road traffic conditions fog warning classification determination, reflect the public fog
Effect of road network condition.
3.2
Road network density densityofroadnetwork
Per 100 square kilometers within the scope of technical grade two or more roads (highways, highway, secondary road) and the intensity of.
By equation (1).
B1 =
100 · S
(1)
Where.
B1 --- by the density of road network in the affected area, in units of kilometers per 100 square kilometers (km/100km2);
L --- in the affected area of \u200b\u200bsecondary and higher highway mileage and units of kilometers (km);
S --- that the total area of \u200b\u200bthe affected area, in units of square kilometers (km2).
3.3
Congestion congestiondegree
The actual amount of network traffic and the traffic ratio adaptation.
4 foggy highway traffic conditions Warning classification
According to the situation and the extent of fog, combined road network, traffic and terrain, fog warning by road traffic conditions from strong to weak is divided into the following three
Levels (Table 1).
...
