文章编号：1672-5328（2009）03-0080-06

蔡　云，杨晓光，王　浩
（同济大学交通运输工程学院，上海 201804）

摘要：先进的交通信号控制系统的核心是控制策略及参数模型，建立相位切换结构的目的是为控制策略实现提供基础。传统的感应及自适应控制注重切换规则及优化模型设计，通过比较各种控制策略，从美国NEMA TS2标准中提出的双环相位结构入手，重新定义相位，并建立统一的搭接嵌套规则，最后形成两种模式下的在线相位切换结构。该结构的特点是能够灵活地适应交通流变化，并具有标准的描述形式。

关键词：交通工程；交通控制；NEMA双环相位结构；相位；在线切换

中图分类号：U491.5+1

文献标识码：A

A Flexible On-line Transition Structure of Traffic Signal Phases

CAI Yun, YANG Xiao-guang, WANG Hao
(School of Transportation Engineering, Tongji University, Shanghai 201804, China)

Abstract：The key to building an advanced traffic signal control system is the control strategies and the parameter models, and the purpose to construct a signal phasing transition structure is to lay a foundation upon which the control strategies can be realized. Traditional control strategies, like inductive and adaptive controls, emphasize transition rules and optimization of model design. Through a comparison of various control strategies, this paper starts with the dual-ring structure in NEMA TS2 (U.S.), and redefines signal phases. Then the paper formulates unified nesting rules, and finally establishes the on-line phase transition structure with two patterns. The characteristics of the structure include the flexibility of adaptation to traffic fluctuation, and a standard description.

Keywords：traffic engineering; traffic signal control; National Electronic Manufacturers Association Dual-Ring; phases; on-line transition