A Method for Improving Accident Black Spots on Exit Ramps of Expressway

Abstract

The invention relates to an improving method for a dark spot in an accident at an exit ramp of an expressway based on retro-reflection illumination, wherein ramp grading speed-limit signs are arranged at sight through places in front of the starting point and the nose end of a transition section of a deceleration lane of the exit ramp; a main line single-layer linear induction sign and a ramp double-layer linear induction sign are arranged behind the nose end of the exit ramp; a lane edge line of the exit ramp deviates towards the inner side and reduces the width of a traffic lane, an edge line of a lane at the outer side is set to be a vibration edge line; raised road signs are arranged at the outer sides of a main line and a road edge line of the exit ramp from the end point of the deceleration lane, and a single-side anti-collision bucket is arranged at a guardrail next to the outer side of the ramp from the nose end of the exit ramp, so as to form a high-frequency vision information stream commonly; road-surface lateral deceleration marked lines are arranged in the heading direction of the exit ramp at an interval of 8-12m, so as to form an intermediate-frequency vision information stream commonly with road side linear induction signs; and road side vibration marked lines, anti-collision buckets and the guardrail form road side multi-level protection, and all safety facilities are made of high-strength reflecting materials. The improving method is suitable for realizing the speed limit for a downgrade ramp at an exit of the expressway (40-60km / h).

Description

technical field [0001] The invention relates to a retroreflective lighting-based method for improving accident black spots on an expressway exit ramp. The safety and comfort of driving on the expressway exit ramp are improved by using the design method. Background technique [0002] Expressway exit ramps have severe speed transitions, common overspeeding, large speed differences, frequent rear-end collisions and collisions. [0003] The number of accidents on the exit ramp of the expressway is high, and the accident rate is high, which is very easy to become an accident black spot. Research on the classification of expressway traffic accident forms at home and abroad shows that the number of accidents on exit ramps accounts for about 40% of the total number of accidents within the interchange and service areas, and the main accident forms are: hitting fixed objects (more than 50%), tailgating Collision (about 20%), rollover accident (about 20%), these three types of acciden...

AI Technical Summary

Problems solved by technology

[0009] The existing methods for improving the safety facilities of highway exit ramps in China often focus on the research of road surface vibration deceleration facilities and roadside protection measures (such as guardrails), but lack of improvement from a system perspective

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