This standard specifies the organization principles of one-way traffic in urban road traffic organization. This standard is applicable to the public security traffic management department when setting up one-way traffic in urban road traffic organization. GA/T 486-2004 Organization principles of one-way traffic on urban roads GA/T486-2004 Standard download decompression password: www.bzxz.net

Appendix A of this standard is an informative appendix.
This standard is proposed and managed by the Technical Committee for Standardization of Road Traffic Management of the Ministry of Public Security. The responsible drafting unit of this standard: Traffic Management Science Research Institute of the Ministry of Public Security. The main drafters of this standard: Pan Hanzhong, Wang Jianqiang, Zhou Zhiqiang, Tu Aihua GA/T486--2004
1 Scope
Principles for organizing one-way traffic on urban roads
This standard specifies the principles for organizing one-way traffic in urban road traffic organization. This standard applies to the public security traffic management department setting up one-way traffic when organizing urban road traffic. 2 Terms and Definitions
The following terms and definitions apply to this standard. 2.1
One-way traffic
one-way street
GA/T 486—2004
Or one-way traffic, one-way lane, one-way road (street), refers to road traffic that only allows motor vehicles to travel in one direction. 2.2
Flow direction ratio
The ratio of the heavy traffic volume in one direction to the light traffic volume in the other direction on the road (flow ratio ≥ 1). 3 Classification and grading of one-way traffic
3.1 Classification of one-way traffic
3.1.1 Fixed one-way traffic (Class I)
On all lanes of a certain road, all kinds of motor vehicles are only allowed to travel in one specified direction at all times. 3.1.2 Scheduled one-way traffic (Class II)
Specifies that vehicles are only allowed to travel in one direction during a certain period of time, and travel in both directions at other times. 3.1.3 Fixed-type one-way traffic (Class III) specifies that certain vehicles (such as public transport vehicles) can travel in both directions, while other vehicles are only allowed to travel in one direction, or specifies that only certain vehicles are allowed to travel in one direction.
3.2 Classification of one-way traffic
3.2.1 Class I1
Specialized roads, all vehicles are motor vehicles, and parking spaces are not allowed on the roadside. 3.2.2 Class I2Www.bzxZ.net
Quasi-specialized roads, all vehicles are motor vehicles, and one-way parking spaces can be set up on one side of the roadside. 3.2.3 Class I3
Mixed roads, motor vehicles and non-motor vehicles are mixed, and one-way parking spaces can be set up on one side of the roadside; or motor vehicles and non-motor vehicles are separated; or reversible lanes are used, and motor vehicles and non-motor vehicles are separated. 4 Conditions for setting up one-way traffic
4.1 Road network conditions
4.1.1 Chessboard roads
The chessboard road system is the most suitable urban road network for organizing one-way traffic. One-way traffic can be organized by pairing two adjacent roads, or part of the road system can be organized into one-way traffic, but the road network density should be large and the road spacing should not exceed 300m. 4.1.2 Strip-shaped roads
Strip-shaped urban road systems are easier to organize one-way traffic. One-way traffic can be organized by selecting roads that may be paired in local areas. 1
GA/T 486---2004
The condition is that there are adjacent or close roads that can be paired, and the roads are in a dual relationship. 4.1.3 Other road networks
When there are two adjacent loops in the road network and the length is short (1km~2km), one-way traffic can be considered. Two adjacent radial roads can also be organized for one-way traffic.
4.2 Road section conditions
4.2.1 In special cases, when two parallel roads are not of the same grade, it can be considered to set the lower grade road as one-way traffic, and the other road is still two-way traffic.
4.2.2 Old city roads with high density of road network but insufficient road width: - When the road width is less than 10m and the flow ratio is greater than 1.2; - When the road width is less than 12m and the flow ratio is greater than 2, and there are parallel roads that can be paired; - When the road width is not enough to set up pedestrian and vehicle lanes at the same time; - For roads that can only be arranged with an odd number of lanes, it is not conducive to the use of road resources in two-way traffic; - A group of branch roads and secondary roads parallel to the main road with large traffic volume; - Roads with narrow width that are not suitable for fixed vehicles, such as roads with two-way traffic of rail vehicles, can be arranged as one-way traffic routes. 4.3 Intersection conditions
When five or more roads intersect, the intersection is difficult to handle, and it is advisable to set some or all of the intersecting roads to one-way traffic. 4.4 Traffic flow conditions
4.4.1 Tidal traffic
Roads with tidal traffic can be set to timed one-way traffic. 4.4.2 Traffic composition
When the traffic composition is very complex, it can be set as one-way traffic with a certain type of vehicle. 4.4.3 Traffic flow
According to the OD survey data, one-way traffic can be set up for large traffic volumes in certain directions. 5 Environmental conditions
When a certain area in the city cannot solve the parking problem, some secondary roads and branch roads can be set up as one-way traffic, and one or both sides of the road can be set up as temporary parking lots.
5 One-way traffic setting procedure
5.1 Traffic condition survey and analysis
5.1.1 Determine the scope of the road network for the proposed one-way traffic. The scope of influence is generally: all intersections of the proposed one-way traffic roads and the two adjacent intersections. 5.1.2 Traffic survey content
5.1.2.1 Socio-economic and land use survey Investigate the socio-economic situation and the nature of the land in the affected area. 5.1.2.2 Road condition survey
Investigate the width, length, slope, curvature and road spacing of road sections, and investigate the geometric shape of intersections. 5.1.2.3 Traffic condition survey
Investigate the traffic flow direction of motor vehicles and non-motor vehicles at intersections and road sections during peak and off-peak hours (see Appendix A for the survey form), basic conditions such as bus stops, bus routes, bus lanes and bus hubs, and investigate the parking demand on the road or on the side of the road (sidewalks, non-motorized vehicle lanes, etc.) in the affected area. 5.1.3 Evaluate the traffic conditions of existing roads
The evaluation indicators are mainly the saturation level of intersections in the road network and the road service level. 5.2 Formulate one-way traffic plans
GA/T486—2004
Prepare multiple one-way traffic network organization plans as needed and possible, and simulate the actual traffic conditions through traffic simulation. 5.3 Traffic Management Facility Setup
Design traffic management facilities including traffic signs, markings, signal lights, monitoring and crossing facilities according to each plan, and prepare a project budget. 5.4 Effect Evaluation
5.4.1 “Pre-evaluation”, simulate the current situation according to the survey data before the implementation of the one-way route, determine the effect, and compare the basic data. Compare and optimize the one-way schemes based on the three aspects of less traffic delays, short detour distance, and balanced road network load. 5.4.2 “Post-evaluation”, one month after the implementation of the one-way traffic plan, conduct a comparative survey according to the content of the “pre-investigation”, determine the effect of the plan and make timely adjustments
GA/T486-2004
Small passenger car
100~～
：30~
： 45～
： 45
15～
：30～
￥45~
Appendix A
(Informative Appendix)
Survey Form
Survey Form for the Direction of Motor Vehicle Flow at Intersections
Taxi
Bus
Articulated Truck
Small Truck
Large Truck
Table A.2 Survey Form for the Direction of Non-motor Vehicle Flow at Intersections |tt||Bicycle
Tricycle
Trailer
Motorcycle
References
［1]GB918.2—1989 Road Vehicle Classification and Code Non-motor Vehicles
［2］GA17.1—1992 Road Type Classification and Code［3]GA24.4—1992
Motor Vehicle Traffic Classification and Code
[4J GA/T 299.---2001
Road Traffic Flow Survey
GA/T 486—2004
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