Location of Fullwidth Service Lanes on Truck Escape Ramp

Abstract:

Under the condition that fullwidth service lanes are set on truck escape ramps and the width of arrester bed is 9.0 m or 4.5 m, 48 groups of motion parameters in the process of entering truck escape ramps by 5 drivers were obtained through driving simulation UCWin Road Ver.9. Then the minimum turning radius, adjusting time, steering angle amplitude and steering angular frequency were extracted by judging lateral migration rate and validated by theory. The correlation between the above five index and operation speed was analyzed. At the same time, the significance between the above five indexes and the fullwidth service lane’s position was tested via the variance analysis and the paired sample T test. Research result indicates that when the arrester bed width is 9.0 m and service lane is located on the left side, the errant vehicle will be more stable and easier to enter the truck escape ramp, the space to adjust the vehicle’s driving direction will be larger, and it will be easier to enter the truck escape ramp and drivers’ psychological tension will decrease. When the arrester bed width is 4.5 meters and the service lane is located on the left side, the errant vehicle will be more stable and the entrance of the truck escape ramp will be more accessible.