TOSCo is a vehicle system that uses DSRC communications with an infrastructure subsystem to approach a signalized intersection in an optimized fashion. TOSCo vehicles use data from the infrastructure to plan an approach to the intersection to avoid a stop if possible. This phase of the project involves building the complete system and testing the system in a closed course and on a live corridor. This project also includes simulation of a corridor to assess the potential benefits of the system with various market penetrations.