Evaluation of Impacts of Adaptive Cruise Control on Mixed Traffic Flow
Publication: Traffic And Transportation Studies (2002)
Abstract
This paper addresses the impacts of Adaptive (Intelligent) Cruise Control (ACC) laws on the traffic flow. Semi-automated vehicles, such as ACC Vehicles, with the capability to automatically follow each other in the same lane, will coexist with manually driven vehicles on the existing roadway system before they become universal. This mixed fleet scenario creates new capacity and safety issues. In this paper, simulation results of various mixed fleet scenarios under different ACC laws are presented. Explicit comparison of two ACC laws, Constant Time Headway (CTH) and Variable Time Headway (VTH), are based on these results. It is found that the latter one has better performance in terms of capacity and stability of traffic. Throughput increases with the proportion of CTH vehicles when flow is below capacity conditions. But above capacity, speed variability increases and speed drops with the CTH traffic compared with manual traffic, while the VTH traffic always performs better.
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Copyright
© 2002 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
ASCE Technical Topics:
- Adaptive systems
- Automation and robotics
- Business management
- Engineering fundamentals
- Highway transportation
- Infrastructure
- Intelligent transportation systems
- Laws and regulations
- Legal affairs
- Practice and Profession
- Systems engineering
- Systems management
- Traffic capacity
- Traffic engineering
- Traffic flow
- Traffic management
- Traffic speed
- Transportation engineering
- Transportation management
- Vehicles
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