一种灵活的在线交通信号相位切换结构

A Flexible On-line Transition Structure of Traffic Signal Phases

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NEMATS2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。

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 tmified 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.