Chapter 6 Coordinated Traffic Control 6.1 Introduction e上 Please students think about the 单个交叉口 relations of all these 单个交叉口 线控制信号 intersections 系统 he types of traffic control 单个交叉口 网络信号系统 城区界线 图13-1信号系统的类型6.1 Introduction Chapter 6 Coordinated Traffic Control Please students think about the relations of all these intersections • The types of traffic control