Table 1: summary of transit signal priority deployment results

2.3. System Installation
The typical EVP and TP system has three major subsystem components, including the in-vehicle subsystems, road-side subsystems, and center subsystems. Each subsystem has its own installation challenges. In-vehicle subsystems consist of those component parts of the system that are installed on the vehicle. For example, a simple EVP and TP system may consist of the emitter, its power system and its microprocessor system. More complex systems may include a vehicle location device such as a GPS locator and automatic passenger counters. Road-side subsystems are those parts of the system that reside outside the designated vehicles. Typically, they would include detectors mounted in the vicinity of the traffic signals and power sources that service the detectors, microprocessors and communications equipment collocated with the traffic signal controller boxes. Center subsystems are those items of equipment that must interface with the central traffic signal management system, the transit management system, and home station monitoring systems.
It is recommended that the contractor be responsible for quality control throughout the installation process. The contractor should be required to provide installation drawings for approval. In addition, the contractor should be required to present a prototype installation of every subsystem and complete operational testing of all prototype installations. The contractor should also provide for review site-specific installation specifications tailored to the physical characteristics of each site.