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中文摘要：
分析了影响城市快速路互通立交间距的各种因素，给出了互通立交间距的基本定义及假设，引入临界安全间隙概念，采用概率论、可接受间隙理论及运动学的方法，在保证车辆安全运行的前提下综合考虑互通立交加、减速车道长度及车辆完成车道变换所需要的基本路段的长度，从系统的角度构建了互通立交最小间距模型。通过与仿真软件CORSIM模型的求解值比较验证了该模型是有效的，模型计算结果表明，城市快速路互通立交适宜的最小间距为1．0～2．0km，说明我国现行规范中立交间距的设计标准偏小。
英文摘要：
Initially, the definition and basic hypothesis of interchanges spacing are put forward.Then the factors affecting the distance between interchanges are analyzed and the scientific distance between interchanges on expressways are defined. By proposing the conception of critical safety gap and combining the analysis of speed-change lane lengths and lane-change lengths, the kinematics and probability theory are employed to establish the model of the minimum distance between interchanges based on expressway system. Lastly, the model is verified to be feasible through comparison with the simulation outcome of CORSIM.The result suggests that the minimum distance between interchanges ought to be 1.0- 2.0 km rather than the existing provision in our regulations.
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