Driving stability along a bridge and tunnel connection segment under rain and snow conditions(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2019年04期
- Page:
- 109-117
- Research Field:
- 道路工程
- Publishing date:
Info
- Title:
- Driving stability along a bridge and tunnel connection segment under rain and snow conditions
- Author(s):
- WANG Lu1; LI Longfei2; LIU Yuwen1; LI Huaen1
- (1. School of Highway, Changan University, Xian 710064, Shaanxi, China; 2. Transportation Planning Survey and Design Institute of Shanxi Co., Ltd., Taiyuan 030012, Shanxi, China)
- Keywords:
- traffic engineering; driving stability; Carsim simulation; bridge and tunnel connecting segment; rain and snow condition
- PACS:
- -
- DOI:
- -
- Abstract:
- To ease traffic safety operational problems of a bridge and tunnel connection segment under rain and snow conditions, Carsim simulation analysis software was used to establish a threedimensional vehicleroad model. Using the two evaluation indexes of lateral offset and yaw rate, the driving stability of a class C standard vehicle along the bridge and tunnel connection segment under rain and snow conditions was systematically analyzed. Then, the influence of vehicle speed, road friction coefficient, and road circular curve radius on the operational and lateral stability was quantitatively analyzed. The results show that the evaluation of vehicle stability by lateral offset and yaw rate is consistent. The smaller and more stable the value of lateral offset and yaw rate, the safer the vehicle driving. The vehicle speed is negatively correlated and the road friction coefficient, and the circular curve radius are positively correlated with the driving stability. In other words, decreasing the vehicular speed and increasing the road friction coefficient and road circular curve radius can effectively reduce the vehicle lateral offset. Under the special driving environment of a bridge and tunnel connection segment under rain and snow conditions, the design speed of the vehicle is reduced by 6.25% (from 80 to 75 km/h,), the road friction coefficient increases to 0.21, or if the minimum circular curve limit radius increases by 6% (from 250 to 265 m), the vehicle is not subject to sharp side slip, and the stability and safety of vehicles is improved. This study provides a reference for mountain highway design and traffic operational management. 1 tab, 21 figs, 22 refs.
Last Update: 2019-07-29