Study On The Analysis Of Highway Separated Line Between Passenger And Freight Transportation’s Economic And Traffic Function Area

With the development of China’s economic and the improvement of people’s living standards, the ownership of car and the transportation volume of expressway increased have increased greatly. In addition, the commerial vehicle keep the tendency of the large-scale and heavy-duty development and the conflict of mixed traffic of passenger and freight vehicles is becoming more and more apparent. Separated line between passenger and freight transportation have been viewed as the new idea of highway construction in the future. It has important significance in solving problem of traffic congestion and the rise of accident rates.First, the paper summarizes research status in the theory and practice at home and abroad, and indicate that the separated line between passenger and freight transportation is irresistible trend in the highway transport industry from comparison of railway development. Based on the related information, the paper study the specificity of Separated line between passenger and freight transportation from different aspects, and determine the the new definition, design vehicle, the isolation facility between truck lane and car lane, the type of road cross section and so on. Based on preamble, the paper establish economic feasibility model, serving as the argumentation of the economic feasibility in construction of Separated line between passenger and freight transportation.Next, the paper advance a new theory of the traffic function to solving the problem of traffic flow disorder and the location of interrupted position. In that function, the car change lanes accord with the different priority, to ensuring the car to access the highway entrance. The different priority is set up by the different origin and end point of dividing line of lane.According to traffic flow characteristics and the theory of lane change, the paper establish a mathematics calculation model to determine the scope of traffic function and the interrupted position of the isolation facility between truck lane and car lane. It lays the foundation for the construction of Separated line between passenger and freight transportation in the future.Finally, within the requirements for the driving in the traffic function,the paper analysis the future traffic security problems and propose improvement measures under the conditions of Separated line between passenger and freight transportation. Combined with the mathematical model,it indicates the position of advance entrance and exit sign, the speed limit signs, the line between change lanes, traffic markings of lanes change,and so on. It also optimizes the design to meets requirements of safety driving. In the future, These measures will provide a good traffic environment for the running vehicle on the expressway of Separated line between passenger and freight transportation.