Study On The Speed Limit Of Highway Tunnels

With the development of economic, public road transport develop very fast, so the modern administrations become the key point. And traffic accidence happen frequently on highways now, without the vehicle and technique elements, the main reason are over speed based on the calculation of traffic administration department.Over speed on highways is a serious problem now, obviously, speed limit is an effective way to guarantee traffic safety. So the government uses speed limit to administrate vehicles on roads. The more stable traffic flow is the less traffic accidence happen. So the target of the paper is not only make the variance of traffic flow to be smallest, guarantee traffic safety, but also make good use of the road based on proper speed limit.The paper is according to a west traffic technology program《Intelligent linkage control study on public road tunnels》accomplished by traffic department of Chongqing communications research & design institute, based on plenty of real and experiment data, refer to many research results from contrives. The paper used theory analyze, experiment and simulation to study the point, analyzed the influence from the change of drivers'psychological to driving behavior, the relation between driving environment and traffic accidence, the relation of the character of public road tunnel traffic flows, speed and accidence, built a speed limit model based on speed variance, raised a proper speed limit data on a normal and special part of roads, used vissim to simulate and apply to engineer.