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Impact of cooperative adaptive cruise control on multilane freeway merge capacity
| 题名： | Impact of cooperative adaptive cruise control on multilane freeway merge capacity |
| 正文语种： | 英文 |
| 作者： | Hao Liu; Xingan (David) Kan; Steven E. Shladover; Xiao-Yun Lu; Robert E. Ferlis |
| 作者单位： | Partners for Advanced Transportation Technology (PATH), Institute of Transportation Studies, University of California, Berkeley, Richmond, CA, USA; Department of Civil and Environmental Engineering, University of California, Berkeley, CA, USA; Turner-Fairbank Highway Research Center, Federal Highway Administration, McLean VA, USA |
| 关键词： | Cooperative Adaptive Cruise Control (CACC); freeway capacity; on-ramp merging bottleneck; microscopic traffic simulation |
| 摘要： | Cooperative Adaptive Cruise Control (CACC) allows vehicles to exchange real-time operational information wirelessly, enabling vehicles to travel in strings with shorter than normal time gaps between adjacent vehicles and ultimately increasing the freeway capacity. This study is intended to investigate the impact of CACC vehicle string operation on the capacity of multilane freeway merge bottlenecks, commonly found at on-ramp merging areas on urban freeways. Simulation experiments were conducted using CACC car-following models derived from field test data, together with lane-changing models of CACC vehicles and manually driven vehicles, as well as a maximum CACC string length and inter-string time gap constraint. Simulation results reveal that the freeway capacity increases quadratically as the CACC market penetration increases, with a maximum value of 3080 veh/hr/lane at 100% market penetration. The disturbance from the on-ramp traffic causes the merge bottleneck and can reduce the freeway capacity by up to 13% but the bottleneck capacity still increases in a quadratic pattern as CACC market penetration becomes larger. The findings suggest that there is a need to implement advanced merging assistance systems with CACC at merge bottlenecks for achieving the capacity improvement comparable with the observations at homogeneous freeway segments. |
| 出版年： | 2018 |
| 期刊名称： | Journal of Intelligent Transportation Systems Technology Planning and Operations |
| 卷： | 22 |
| 期： | 3 |
| 页码： | 263-275 |
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