Abstract: In the travel assignment models, the volume of the traffic flow passing a route, link and node and size is proportional to the probability of choosing that particular route, link and node in OD matrix. This paper summarizes Dial assignment model and its properties that are associated with the attributes with the attributes of a logic choice model. On the basis of weight concepts and probability principles, the probabilities of choosing route, link and node have been derived as analytical formulas with node-pair weights.

Key words: dial assignment, path choice probability, link use probability, node probability

摘要： 在道路网络中，交通量在路径、路段、结点中的分配模式与其大小在OD表的各元索中的占有率有着对应关系.本文研究Dial分配模型及其Logic选择特性，运用权理论和概率原理，推导出Dial交通量分配中的路径选择率，路段利用率，结点通过率的计算公式.

关键词: Dial分配, 路径选择率, 路段利用率, 结点通过率