Right-turning lane design method by considering turning characteristic of large vehicle

Abstract

The invention belongs to the field of traffic safety designs and lane designs. Aiming at the maximum sweeping path width and a difference of a radius between front inner wheels and a radius between rear inner wheels during right turning of a large vehicle, the invention provides a right-turning lane design method by considering a turning characteristic of the large vehicle. Compared with the conventional design method, the design method has the advantage that the safety, the efficiency and the land utilization are improved greatly. According to the technical scheme, the right-turning lane design method by considering the turning characteristic of the large vehicle comprises the following step of: calculating deflection of traces of a dragging articulated vehicle and a small coach, wherein (1) the width of a diversion lane is required to be equal to a sum of a wheel trace inner displacement, namely the maximum sweeping path width, and a lateral clearance, and (2) the right-turning trace of the large vehicle is fit by an asymmetric three-center composite curve with a relatively small curve radius of an entrance lane and a relatively large curve radius of an exit lane; and under the condition that the width of the diversion lane and an inner-arc radius are known, drawing the three-center composite curve of a right-turning lane. The method is mainly applied to lane design.

Description

technical field [0001] The invention belongs to the fields of traffic safety design and road design, and in particular relates to a right-turn lane design method considering the turning characteristics of large vehicles. Background technique [0002] In the process of intersection planning and design, the layout of right-turn lanes is directly related to the land use scale of the intersection and the efficiency and safety of traffic operation. On the basis of considering the traffic composition, for urban road intersections, the current "Planning and Design Regulations for Urban Road Level Intersections" select a small car with a length of 5 meters and a width of 1.8 meters and a car with a length of 12 meters and a width of 2.5 meters. Two types of large vehicles are the design models. For road intersections, the current "Highway Route Design Code" selects passenger cars with a total length of 6 meters and a width of 1.8 meters, and trucks with a total length of 12 meters a...

AI Technical Summary

Problems solved by technology

The method of compound curve with single center circle has the characteristics of long tangent line, easy to grasp and strong practicability, which can meet the design requirements of small passenger cars on urban roads, but it is difficult to adapt to large multi-axle vehicles on port roads

Using this design method to design right-turn lanes for large vehicles often leads to two adverse consequences: insufficient turning radius (single center circle radius) or excessive turning radius: excessive turning radius causes waste of intersection land, and easily induces intersections. The phenomenon of random parking at the corner; insufficient turning radius will reduce the ride comfort of large vehicles, increase driving delays, and even interfere with the traffic flow of the adjacent lanes of the entrance and exit roads

Similarly, the three-center circle compound curve design method also has similar problems

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