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摘要: 以可接受间隙理论为基础, 利用概率分析方法, 对由多种车型组成的混合车流进行了分析, 在无控交叉口主路车流车头时距服从二阶Erlang分布条件下, 建立了支路多车型混合车流的通行能力模型, 发展了无控交叉口的混合车流通行能力理论, 通过实例分析, 并与其他模型比较, 本模型计算结果更接近实际情况, 相对误差只有16.6%。Abstract: Based on the gap acceptance theory, the mixed traffic flow was analyzed with probability method. When the flow at major lane of unsignalized intersection follows two-class Erlang dis-tribution, the traffic capacity model of mixed flow at branch lane was developed. With an exam-ple, its calculation results were compared with the ones by other models. The results indicate that this model is more accurate, its error is 16.6%.
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Key words:
- traffic engineering /
- Erlang distribution /
- mixed traffic flow /
- traffic capacity
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表 1 不同车型的临界间歇和随车时距
Table 1. Critical intermittences and follow time-gaps of different vehicle types
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表 2 八个15 min观测时间段的观测结果
Table 2. Observation results in eight observation continuing 15 min
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表 3 八个15 min观测时间段的理论计算结果及误差
Table 3. Theory results and errors in eight observation continuing 15 min
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