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2022

Urban traffic unobstructed and improved operation

Youth Road and Dongfeng East Road intersection

△ Figure 1 intersection geographical location diagram

The urban area of ​​Kunming is radioactive, and the four administrative districts are connected to the central urban area. The central urban area has formed a number of mature business districts based on the "three horizontal and four vertical" roads. Among them, the intersection area of ​​Youth Road and Dongfeng East Road is not only the business district of the central area, but also the two major administrative districts of Panlong District and Wuhua District. Traffic flow.

△ Figure 2 Optimize the front intersection canal figure

As the core traffic node of the central business district, Youth Road and Dongfeng East Road intersect from the two main roads of Youth Road and Dongfeng East Road in the city's "three horizontal and four verticals", connecting multiple mature business centers. The traffic flow of the four directions at the intersection is large, especially in the east and west directions. As a road of the old city, the pass conditions are poor, which leads to the faster gathers of the vehicle, and the distance between the intersection is small. Public facilities, daily traffic and large traffic, bringing tremendous traffic pressure to the intersection.

△ Figure 3 Intersection Late Peak (18: 00-19: 00) flow flow direction (PCU/H)

01

● Analysis of the status quo and problem ●

1. The effect of the business district is obvious, the vehicles are queuted many times, and the regional congestion is prone to hair.

During the evening peak hours, the traffic traffic in four directions increased sharply. Intersection East Import (Dongfeng East Road) is the main gathering of traffic, which carries the traffic flow to the east to west and the neighboring main road from the east to the west and the neighboring main road in Beijing. Or three queues, the traffic efficiency is low, there is a serious congestion, and it is often overflowing to the upstream intersection, resulting in regional congestion in the first ring.

△ Figure 4 Youth Road East Imported Gathering Vehicle Direction Map

△ Figure 5 Intersection East imported vehicles lined up for a long line and overflow

2. The conflict is serious, the tail vehicle stays, and the safety hazards are large

Youth Road is a north -south road. Due to the limited road conditions, the way of release of the intersection is straight to the north and south, and the left turn is released at the same time. Internal hindering Dongfeng East Road, the east -west section of the east and west trains driving normally, the loss of green lights is more, and there is a certain hidden safety hazard on the chaos of pedestrians crossing the street.

△ Figure 6 Left turn with straight motor vehicles and pedestrians conflict

△ Figure 7 Left turn to conflict with straight motor vehicles

△ Figure 8 Figure 8 Recerity of downstream intersection

02

● Optimize ideas ●

In response to the current situation of the intersection, the traffic police detachment and traffic engineers of the Kunming Public Security Bureau decided to "hard and hard" to solve the intersection problems after in -depth investigation and detailed analysis.

1. "hard" measure

Multiple measures for traffic organizations, maximize space utilization

Increase the intersection of the intersection to comprehensively treat the area and adjust the road signs and lamps in the direction of the Youth Road at the intersection, make full use of the existing road conditions, broaden the intersection space, achieve the purpose of changing time with space Pass efficiency.

2. "soft" measure

Signal optimization combination boxing, time use to maximize

On the basis of adjusting the traffic organization, adjust the way of release of the intersection, and further refine the adjustment of the evening peaks, the mainstream direction of Dongfeng East Road is implemented in coordination and control. The combination measures with "phase+time+coordination" resolve the problem of the intersection, reduce the loss time of green lights, and further improve the efficiency of road traffic.

03

● Optimization measures ●

1. Increase the comprehensive treatment area of ​​all directions

Through refined traffic organization design, based on the original traffic organization, a comprehensive treatment area is set up in four directions at the intersection to shorten the time and queue length of the vehicle passing intersection; The head -up channel of the motorcycle is reduced to reduce the interference caused by non -motorized vehicles.

△ Figure 9 intersection adds an integrated area and non -motorized vehicle U -U -Termer Channel

2. Adjust the intersection marker line and lamps

The north and south of Youth Road, the left -to -left common lane is split into a straight and left -turn independent lane, and a set of full -screen lights in the north and the south are adjusted to the left -turn arrow light to alleviate the conflict between the left -to -vehicle and pedestrian, the left -to -vehicle and the straight motor vehicle. A non -motor vehicle conflict with a non -motor vehicle and a direct motor vehicle to improve the efficiency of road traffic.

△ Figure 10 After adjustment of traffic organizations

3. Adjust the phase of the intersection and refine the matching

△ Figure 11 Optimize the way of release of the front intersection

△ Figure 12 Optimize the rear intersection release method

4. Collect the signal coordination of the "H" type area

Dongfeng East Road East Import is the main gathering of traffic, carried Dongfeng East Road from east to west, and adjacent main roads Beijing Road South Left and North Right to turn on traffic; Coordinated control to achieve the purpose of fluke. While maintaining the coordination of Beijing Road and Youth Road to the north, the coordination of Beijing Road and Dongfeng East Road, East Import, and East East Road and Youth Road and Dongfeng East Road straight to connect the two parallel roads. To form a signal coordination and control of the "H" type area, improve the efficiency of road traffic, and reduce the length of the east import queue.

△ Figure 13 Optimize the coordinated orientation diagram

04

● Implementation effect ●

1. Conflict point elimination, improvement efficiency improvement

After the implementation of the plan, the cross -left conflict at the intersection was eliminated, and the traffic efficiency and green light utilization rate of vehicles at the intersection were effectively improved.Among them, the efficiency of the overall traffic efficiency of the North and South increases by about 14%, and the efficiency of the left -to -turn transition of North and South imports increases by 38%; the overall traffic efficiency of the East and West is increased by about 18%.△ Figure 14 Optimize the flow of flow before and after the peak (18: 00-19: 00) flow flow to the diagram

△ Figure 15 Optimize the backstream intersection, there is no return overflow

2. The East East of the West in the evening is significantly reduced significantly

△ Figure 16 Optimized East Imported Unparalleled Equipment

△ Table 1 East import optimization before and after data comparison

05

● Case summary ●

In this case, measures such as adjusting traffic organizations, optimizing release methods and matching time are used to separate conflicts, improve the efficiency of vehicles, and ensure the safety of pedestrians and non -motorized vehicles.At the same time, coordinate and optimization of the convergence point, accelerate the evacuation of vehicles in the business district, eliminate vehicles to queue up, increase the speed of vehicle circulation, and reduce travel delays.

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Source Kunzhong Traffic Police

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