Design method for improving traffic of T-shaped road intersection based on asymmetrical traffic requirements

Abstract

The invention relates to a design method for improving the traffic of a T-shaped road intersection based on asymmetrical traffic requirements. The design method comprises the following steps: cancelling a pedestrian crosswalk (12) with lower crossing requirements in a trunk road, and setting an oblique crosswalk with a trunk road sidewalk as a starting point and a crossing point of the pedestrian crosswalk (12) and a corner traffic island (1) as a final point; setting a twice-crossing safety island (6) at the center of the road intersection, and setting a safety island divided block (8) on the safety island (6), and setting a safety island guide line around the safety island (6); extending a straight-going vehicle entry lane at the side of the cancelled pedestrian crosswalk (12) as a zigzag stop line (9) and a left-turning waiting zone (10); and setting a left-turning guide line (5) in the road intersection, and setting signal lights at the starting point and the final point of the oblique crosswalk to realize the same phase traffic of pedestrian on the oblique crosswalk and left-turning vehicles on the cross road. With the adoption of the method, the traffic area of the T-shaped intersection is improved, and the traffic conflict is reduced; and the method is applied to T-shaped intersections with large left-turning vehicle flow at the cross roads, asymmetrical requirements for pedestrians to cross the street and lower vehicle speed.

Description

technical field [0001] The invention relates to an improved traffic design method for T-shaped intersections of urban roads aiming at asymmetrical traffic demands. Background technique [0002] Asymmetrical traffic flow at urban T-shaped intersections is very common, while the conventional symmetrical channelized traffic design affects the traffic efficiency of intersections. Urban T-shaped intersections generally have three pedestrian crossings at the entrances in each direction. However, due to the existence of asymmetrical traffic demand, there is a large left-turning flow of motor vehicles at the intersection and a large demand for pedestrians to cross the street. One of the crosswalks has a low utilization rate; the conventional symmetrical channelized traffic design reduces the traffic efficiency of the intersection, and the utilization rate of the intersection is low when the intersection crosses the road and turns left, resulting in the underutilization of the inters...

AI Technical Summary

Problems solved by technology

[0008] 1) The traffic flow of motor vehicles turning left at the intersection of T-shaped intersections accounts for a relatively high proportion of the total flow, which has serious conflicts with pedestrians crossing the street. Traditional design methods are difficult to allocate pedestrians' right of way within a limited time and space

[0009] 2) Most of the "vehicle-oriented" signal phase timing (motor vehicles going straight and turning left at intersections) and intersection management control fail to fully consider the needs of pedestrians crossing the street diagonally, resulting in pedestrians crossing the street diagonally. Second time traffic lights or crossing the intersection diagonally in violation of the regulations will lead to large delays and the efficiency of the entire intersection is not high

[0010] 3) Intersection control fails to fully consider the characteristics of pedestrian traffic flow. For slow intersections, pedestrians have poor adaptability to the three-dimensional crossing form of "going up to the ground", which induces pedestrians to "take shortcuts" and then "cross the traffic flow" Crossing the street diagonally leads to a high rate of pedestrian crossing violations, serious traffic conflicts, and easy to induce traffic accidents

[0011] 4) There are few studies on oblique zebra crossings at urban intersections, and the left-turning traffic of motor vehicles and pedestrians crossing the street at T-shaped intersections have not been considered uniformly, nor have they been popularized and applied at large-area intersections

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