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ESTIMATION OF RAMP CONTROL EFFECTIVENESS THROUGH MICROSCOPIC SIMULATION.
| 题名： | ESTIMATION OF RAMP CONTROL EFFECTIVENESS THROUGH MICROSCOPIC SIMULATION. |
| 作者： | Michalopoulos-Panos-G; Hourdakis-John |
| 关键词： | Ramp-metering; Simulation-; Technology-assessment |
| 摘要： | Recent public opposition threatened to abandon ramp control as a traffic management option in the Twin cities of Minneapolis and St. Paul, which has one of the most extensive ramp control systems in the nation. In response to this Mn/DOT had to produce tangible independent evidence that ramp metering is effective in order to avoid turning off the meters. Simulation is the most widely accepted technique for achieving the stated objectives without turning the metering system off and was therefore used in this study. Two freeway sections were selected for detailed testing and the results along with the methodology are presented here. The results confirm that ramp metering is effective on the ramp/freeway system (not just the freeway) but they also revealed excessive delays on certain ramps that seem to support the concerns raised by the users. Real life issues related to the simulation implementation process (data collection and filtering calibration, interpreting/summarizing results, etc.), are also presented. Through the course of this work simulation reliability was established by defining a successful calibration/validation methodology and by identifying, in the process, certain operational problems related to the surveillance and control system deployed which were unknown. Finally, a general methodology was developed for evaluation that can easily be adapted to any user specified control strategy or used to improve an already existing one without field disruptions. |
| 总页数： | ITS America. Meeting (12th : 2002 : Long Beach, Calif.). Securing our future : ITS America 12th Annual Meeting and Exposition 2002 : conference proceedings. 2002. pp25 |
| 报告类型： | 科技报告 |
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