Design method of T-shaped intersection of arterial highway in mountain area for traffic safety

Abstract

The invention relates to a design method for a T-shaped intersection of an arterial highway in a mountain area for traffic safety. Roadside protections are graded according to the collision energy of vehicles steering at the roadside of the intersection, and corresponding novel concrete guard bar structures are arranged; guard bars comprise herringbone collision posts and independent concrete short bases, the requirements of different protection levels of the roadside at the intersection are met by regulating the spaces, sizes and the depth embedded into a roadbed of the herringbone collision posts, and the purpose of protecting the vehicles steering at the intersection is achieved; the included angle between the herringbone collision posts and the edge line of a lane is 5-15 degrees, so that the protection area for steering vehicles is increased; PVC (poly vinyl chloride) pipes are sheathed on the outer layers of the collision posts, red-and-white retroreflection vertical face mark lines are arranged on both the collision posts and the concrete short bases, so that the visibility of the intersection is improved; 3-4 groups of vibration deceleration zones are arranged on the crossed road 3-6m away from the intersection; vibration side lines are additionally arranged at the roadside in the range of 30-50m in all the directions of the intersection. The design method is applicable to controlling the T-shaped intersection in the mountain area without signal control, and the primary road is a second-class highway or a first-class highway.

Description

technical field [0001] The invention relates to a traffic safety design method for a T-shaped intersection of an arterial road in a mountainous area. The design method is adopted to ensure the driving safety of the T-shaped intersection of an arterial road in a mountainous area. Background technique [0002] The characteristics of traffic flow at arterial highway intersections in mountainous areas are complex, and traffic safety facilities are lacking, which are frequent spots of traffic accidents. For mountainous arterial highways, the overall traffic flow is not large, so most of them are unsignalized control intersections. Studies have shown that the sum of the accident rate of two T-shaped intersections is about 43% of that of a cross-shaped intersection. Reconstructing T-shaped intersections is one of the improvement methods for non-signal-controlled intersections, so T-shaped intersections are the most common design form of mountainous intersections. The main reasons ...

AI Technical Summary

Problems solved by technology

[0009] The present invention aims at the characteristics of unreasonable design of safety facilities at T-shaped intersections of existing mountainous arterial roads, common speeding, difficulty in discovering the position and f

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