摘要
本文借助Fisk运量随机配流模型建立一个简单二层规划模型来研究交通信息的最优发布水平，通过模型分析得出一些重要结论。在非拥挤交通网络中，信息发布不产生外部效果，信息系统应发布全部信息；在严重拥挤的交通网络中，产生正的外部效果，信息系统应发布全部信息；在一般拥挤网络中，可能产生正的外部效果，也可能产生负的外部效果，应根据具体情况选择合适的信息发布水平。
This paper investigates the optimal level of information release by establishing a bilevel programming model based on Fisk s stochastic traffic assignment, and theoretically draws several significant conclusions. In non-congested transportation network, full information should be released through motorist information system by reason that it produces no externality. Motorist information system should also release full information with positive externality when system congestion is heavy. However, it is necessary to determine the proper information level releasing in moderate congested transportation system due to its positive or negative externality.
关键词
交通信息
信息发布
随机配流
外部性
Traffic information, Information release, Stochastic traffic assignment, Externality
