关键词: 高速公路交通事件管理, 仿真, 延误, 路径变更, 信号配时

Abstract: This paper presents a CORSIM-based simulation approach to evaluating the effects of incident management and signal timing modifications on traffic operations along I-75 and alternative routes in Sarasota County, Florida, U.S.A. The County has developed special countywide signal timing plans on alternative routes to guide and direct motorists coming off the interstate (I-75) back onto the interstate at an appropriate location when a traffic incident happens on I-75. These special signal timing plans were developed for six incident conditions using the SYNCHRO signal timing software. Based on the SYNCRHO data provided by Sarasota County, a CORSIM data set was developed for the evaluation of the effectiveness of the route diversion plan. The findings from the CORSIM analysis indicate the route diversion plans developed by the County are very effective in terms of traffic operations, reducing overall network delay by an average 21%. An additional sensitivity analysis was conducted for one of six incident conditions to examine the impact of diverted traffic volume on traffic operations. The results implied that the percentage of diverted traffic volume had a great impact on the total delay of the entire network. A 10% diverted traffic volume was found to give minimal total network delays based on the case study.

Key words: freeway incident management, simulation, delay, diversion routes, signal timing