道路交通系统类热力学熵及其应用

基于道路交通系统的组成、特点和状态与热力学系统的相似性，应用熵对其进行描述．通过分析热力学熵的系统参数广延量(热流)和强度量(温度)，用交通量、密度和速度构造了道路交通系统的类热力学熵，揭示了道路交通系统类热力学熵产生的内部机制．并通过分析熵与流和力的关系，应用熵理论建立了动态密度模型和速度模型，为交通规划和交通系统仿真提供了基本原理及理论基础，使较为松散的理论体系系统化．

Establishment and Application of Thermodynamics Entropy to Road Traffic System

Based on the similarity of the component, character and the state between traffic and thermodynamic systems, this paper introduces the principle of entropy to describe traffic systems. By analyzing the parameters(heat flow and temperature) of the thermodynamics principle of entropy, the thermodynamics entropy of the road traffic system is established with the traffic volume, density and speed, thus revealing the inner mechanism of entropy. On the basis of the theory of entropy and by analyzing the relationship of entropy with the flow and the power, the dynamic density and speed formulae are derived. This provides a fundamental theory for transportation planning and traffic simulation, thus making traffic flow theories more systematic.