| Summary |
Chin-Yeh Tung, 2007,06
Institute of Traffic and Transportation National Chiao Tung University
Many countries around the world devote to develop Intelligent Transportation Systems (ITS) to solve congestion problems, which coupled with some issues of incidents, consumption of energy resource, environmental pollution, and transportation safety. Automated Highway System (AHS) is not only the most hi-technical subsystem in the 9 subsystems of ITS, but also the ultimate goal of development of ITS. An automated-control platoon approaching with high speed and small vehicular spacing will face to critical impacts when incident occurs on downstream highway. Prompt response to lane-blocking incidents is a critical issue in development of advanced AHS although all the limited existing AHS technologies are on trial. But there are few researches to discuss these issues.
This paper focuses on the response to incidents for single-automated-lane highway system to design a control logic which permits automated vehicles (AC) change to adjacent lane. The embedded traffic control logic is based on the safety requirement. First we present three dynamic spatial zones, which are platoon decomposing, incident-induced car-following and lane-changing, and mandatory braking. This paper is focus on embedding control logic with the views of relative velocity and vehicular spacing to make decision of automaic-control vehicles via avoiding longitudinal and lateral collisions. Then, we compose BCB programming language to do sensitivity analyses of many scenarios, and find the relationships between platoon size, platoon speed, variable traffic condition, platoon headway speed and traffic flow. |
