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Study of Rescue Lane Design Method on the Mountainous Expressway Downhill Path

Author: ChenBo
Tutor: MaGuoZhong
School: Southwest Jiaotong University
Course: Traffic and Transportation Engineering
Keywords: mountainous expressway the downhill path the rescue lane the heavy-duty lorry breaking failure the design method
CLC: U412.3
Type: Master's thesis
Year: 2007
Downloads: 278
Quote: 6
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Abstract


The traffic accidents, made by the heavy-duty lorry and due to breaking failure, happen from time to time on the downhill path of mountainous expressway. Then it is of far reaching importance for the study of the emergent rescue theory and the design method of the rescue lane, so as to utmostly exert the danger avoidance function of the rescue lane, and satisfactorily solve the safety problem of the mountainous expressway, improve the safety operational level of the road section.This text, through the monitoring and analysis of the brake drum’s temperature rise of the heavy-duty lorry when it brakes on the long and steep downhill path, probes into the reason and regular pattern of the vehicle’s braking failure on the long and steep downhill path, thus comes out the relationship between the heavy-duty lorry’s braking failure and the gradient, slope length on the long and steep downhill path, get the calculation formula of the speed and gradient, slope length after the braking failure, put forward the reasonable location of the rescue lane setup and the principle of the sizing grid of the adjacent rescue lanes.Based on the Principle of Conservation of Energy, preliminarily put forward the danger avoidance thesis and principle, that is the braking failure vehicle driving into the rescue land for compulsory energy lose and speed slowdown. Meanwhile, in the country for the first time put forward the viewpoints as the classification of the rescue lanes: the normal speed slowdown and compulsive slowdown section; and the pavement are divided as normal slowdown pavement and compulsive slowdown pavement.In terms of the Principle of Conservation of Energy and Newtonian Mechanics, expound the calculation formula of the length of the normal slowdown section and the compulsive slowdown section of the rescue lane. Referring to the existing highway standard and technical specification, put forward the rescue lane’s longitudinal slope design and cut section design, the design principle and method of the joint of rescue lane and main route.On the ground of the data get from the real vehicle full size test, put forward the structure formation and design principle of the rescue lane normal slowdown pavement and compulsive slowdown pavement.

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