Field Test Research on Vehicles' Speed Driving Behavior in Multi-Lane Freeway Interchange Merging and Diverging Areas

摘要

In order to explore and research the characteristic of vehicles' speed as a measure of driving behavior in multi-lane freeway interchange merging and diverging areas, and provide realistic basis for safety in geometric design principles, this paper examined speed data collected from the Hu-Ning multi-lane freeway interchange group. The field vehicle velocity data were collected using the MC5600 vehicle type pneumatic tube system and subsequent statistical analysis was performed using the SPSS Statistics software package. Observations showed that at two-lane ramp terminals in merging areas, the average speed of cars was 60～70 km/h, and the operating speed (V_(85)) of cars was 80～90 km/h. At two-lane ramp terminals, the average speed of trucks was found to be 60～65 km/h, and the operating speed (V_(85)) of trucks was found to be 65～75 km/h. At two-lane ramp terminals in diverging areas, the average speed of cars was 75～85 km/h, and the operating speed (V_(85)) of cars was 90～100 km/h. The average speed of trucks at two-lane ramp terminals was found to be 70～80 km/h, and the operating speed (V_(85)) of trucks at these sites was found to be 80～90 km/h. From the research we can determine that the operating speed (V_(85)) at the diverging and merging areas may be better suited for use in geometric design procedures and other analysis model calibration purposes, from a safety perspective.