A Surveys of Detour Guidance Operations on Expressways

日本高速公路网络的总长度现在超过6500公里，每天有300多万辆汽车在使用它们。高速公路网是支撑日本经济、工业和社会活动的最重要的基础设施之一。然而，随着交通需求的不断增加，高速公路用户现在面临着城市高速公路路段和农村干线路段的严重交通拥堵问题。为了应对这种情况，高速公路管理当局正在敦促司机更有效地利用高速公路系统，告知他们每个高速公路路段的当前行驶时间，以便选择有效的路线。鉴于此，本文对高速公路瓶颈仿真模型进行了改进，对高速公路上的长距离交通进行了仿真，并对绕行引导操作的有效性进行了评价。在从丰田立交到京都东立交约180公里长的东美高速公路上进行了一系列交通调查，并根据调查收集的数据对改进的模拟模型进行了校准。利用标定后的仿真模型，开发了高速公路长途行驶时间估算和绕行路线选择的程序。

The total length of the Japanese expressway networks now exceeds 6,500 km and more than three million vehicles are now using them every day. The expressway networks are one of the most important infrastructures which support Japanese economic, industrial and social activities. However, with the increasing traffic demands, expressway users are now suffering heavy traffic congestion on expressway sections in urban areas as well as on trunk route sections in rural areas. In order to cope with this situation, express highway authorities are urging drivers to make more effective use of the expressway system by informing them of the present travel time of each expressway section for selecting effective route.In view of this, a computer simulation model called the expressway bottleneck simulation model was modified to simulate long distance traffic on expressways and to evaluate the effectiveness of detour guidance operations.A series of traffic surveys were conducted on the Tomei and Meishin Expressway covering section about 180km in length from the Toyota interchange to the Kyoto East interchange and the modified simulation model was calibrated based on the data collected during the survey.A procedure for estimating long distance expressway travel time and selecting an appropriate detour route was developed using the calibrated simulation model.