Research On The Operating Speed Predic-TiON Model Of Interchange Ramp

With the rapid growth of vehicles in china, and transportion system continues to advance, therefore,China's highway construction has been developing. As one of the most important components of the highway, Interchange carries considerable influence on the capacity of the highway. This paper is based on the"The study of the model about the west road speed characteristics"project,and the Interchange ramp operating speed prediction model will be studied.About all,the foreign operating speed modle will be estimated and summarized, and then review our country's achievement about the Interchange ramp operating speed prediction model,and to determine the direction of the thesis research.In current existing traffic conditions, designing a scheme of the Interchange ramp operating speed prediction model,and investigate fourteen ramps,including 104 survey points. on the basis of in-depth analysis of the theories and research on the field, and obtain some valid data.This data will be used on the construction on the Interchange ramp operating speed prediction model.Based on the measured data, rendering the vehicle speed changes in ramp plans, and analyse the Interchange ramp operating speed prediction model of the vehicle on the ramp.According to the trend of the operating speed, the ramp is divided into three sections: braking segment, uniform segment, accelerating segment. Trough Analysis of the ralationship between the Interchange ramp operating speed of the three sections and influencing factors,confirm the correlation coefficients of the nfluencing factors,and construct the Interchange ramp operating speed prediction model.At last, correlation test will be validated,and verify the applicability of the model.