The main factors affecting traffic conflicts in weaving areas of Expressway shared sections include the main line traffic volume, on-ramp traffic volume, on-ramp traffic volume, on-ramp traffic volume, interlaced flow ratio, interlaced area length and so on. The Time to Collision (TTC) model is used to establish the calculation model of traffic conflict number in the weaving area of Expressway shared section, and the sensitivity of traffic conflict influencing factors to traffic safety in the weaving area of shared section is analyzed by VISSIM simulation software. In addition, the weaving area of Chang'an Interchange Outer Ring of Xi'an Circumferential Expressway is selected as the research object, and the VISSIM simulation model is calibrated by using the survey data. The results show that the main line traffic volume and the length of weaving area have a significant impact on the number of traffic conflicts, while the ramp traffic volume, the interlaced flow ratio and the proportion of large vehicles have a small impact on the number of traffic conflicts; the main line traffic volume, the ramp traffic volume, the interlaced flow ratio and the proportion of large vehicles are positively correlated with the number of traffic conflicts, while the length of interlaced area is negatively correlated with the number of traffic conflicts. Key words: shared section of expressway; weaving area; traffic safety; sensitivity analysis; Traffic conflict

CICTP