| Highways construction for the development of Chinese transportation cause has made outstanding contributions. But with the contribution is the problem of highways traffic safety which is can not resolve completely. Compared with other highway traffic accident,the characteristics of highway traffic accident are destructive and harm force huge,property serious. Especially the export and entrance ramp area of highways.In recent years, many scientific researchers devote to the freeway on-ramp traffic safety research. From many Angle of the road line style improved design aspect, road construction aspect,even traffic control aspect and so on to seek the way of solving the traffic safety, and effect is very obvious. But can not eliminate traffic accidents fundamentally. This study is based on this starting point.In order to reduce the damage degree and loss degree of due to the accident cause and relieve the traffic accident dangerous degree in a traffic accident.This study mainly use traffic conflict theory and vehicle collision theory as the theoretical research foundation,and throughout the full text. First, take traffic conflict theory to analyze traffic operation that in the export and entrance ramp of highways. Get the various types of traffic conflict, influence factors of traffic conflict and the judgement of traffic conflict forms and so on. Secondly, assuming the vehicle operation which in the export and entrance ramp to cause traffic accident through various conflict types. And use the collision theory and energy conservation law to compute the lost energy of vehicles collision. Finally, established a safety speed optimization model combining traffic conflict and vehicle collision for vehicles on entry and entrance ramps. Calculation illustrated that the safety speed optimization model will reduce the damageof traffic accidents on the entry and entrance ramps significantly.Effectively reduce the damage and destruction by accident. |
PDF Full Text Request