混合车流的通行能力

应用跟车理论中的刹车应模式，引入不同车型刹车反应时间及制动距离不同的概念，分析了以大车和小车两种代表车型组成的混合车流，在高速汽车专用道的平直段上行驶时，为保证紧急刹车情况下的车流安全而确定的混合车流通过行能力，并给出算例，这一分析结果可作为进一步的实用化模型的雏形，应用于高速道路的实时控制中。

Capacity of Mixed Traffic Flow

With the introduction of the conception of different vehicle types corresponding to different braking reaction time and braking distance, theauthors, on the basis of carfollowing model, have developed a method to determine the capacity of the mixed traffic now on the level and straight expressway segment, which assures the safety of the traffic flow when an emergency stop occurs. For the sake of simplicity, the mixed traffic flow is assumed to be composedof two representative types of vehicles-heavy and light vehicles. A mumerical example as well as a comparison to other methods is included in the paper. The results of this paper is an initial pattern for further practical models, which can beused in real-time surveillance and control system of the expressway.