Federal Transit Administration (FTA) developed an enhanced version of the Transit Safety Retrofit Package (TRP) system that was originally part of the United States Department of Transportation (USDOT) Safety Pilot Model Deployment, a large-scale Connected Vehicle (CV) deployment. The enhanced TRP (E-TRP) was based on the earlier system, focusing on reducing pedestrian and vehicle conflicts with transit buses in the greater Cleveland, Ohio, metropolitan area.

Key technologies included Dedicated Short-Range Communications (DSRC) for  vehicle-to-vehicle and vehicle-to-infrastructure communication, High-precision Global Navigation Satellite System (GNSS) for vehicle tracking, and Forward Looking Infrared  (FLIR) cameras for enhanced pedestrian detection.

The deployment included two subsystems: (i) In-Vehicle Subsystem (IVS), a transit vehicle-based subsystem, and (ii) a Roadside Subsystem (RS) at each of the selected street intersections. The E-TRP featured enhanced versions of the Pedestrian in Crossing Warning (PCW) and Vehicle Turning Right in Front of Bus Warning (VTRW) CV applications. 

A total of 24 Greater Cleveland Regional Transit Authority (GCRTA) transit buses for field testing at three locations: one signalized intersection, one non-signalized intersection, and one mid-block crossing. The buses operated in revenue service for a period of six months, from February to August in 2018. 

Table 1. System Deployment Costs

The evaluation team extrapolated available data to estimate the system cost for a full deployment of 47 buses for the selected bus routes and a total of 27 instrumented intersections. The estimated total deployment cost of a full-coverage system was $2,163,180.