Two-way cable TV networks can provide the communications requirements for centralized traffic control systems, and offer both performance and cost advantages. Wide-area cable plant coverage makes practical the extension of centralized control beyond central business districts. Existing types of traffic controller equipment can be utilized in central control systems by means of adapter interface assemblies built into Remote Communications units connected to the cable system. A combination of Time Division Multiplex and Frequency Division Multiplex techniques are used for efficient utilization of available bandwidth.