This report describes the architecture, functionality and the field demonstration of a newly developed dedicated
short-range communication (DSRC)-based Vehicle to Infrastructure (V2I) communication system for improving
traffic efficiency and safety in the work-zone related congestion buildup on US roadways. The goal was to develop
a portable system that can be easily deployed at a work zone site to acquire and communicate important travel
information, e.g., travel time (TT) and start of congestion (SoC) location to the driver. By providing this
information, i.e., SoC location and TT, drivers can make informed decisions on route choice and be prepared for
upcoming congestion. The system is composed of a portable road-side unit (RSU) that can engage the on board
units (OBUs) of the traveling vehicles using DSRC technology to acquire necessary traffic data (speed, time, and
location). From the acquired data, the RSU periodically estimates the SoC location and TT that are broadcast to all
vehicles in its coverage range. An OBU receiving the broadcast message calculates the distance to the SoC
location. The distance to the SoC location and TT are then relayed to the driver, who can make smart decisions
regarding whether to seek an alternate route and when to expect a sudden speed reduction. Results from the field
demonstration have shown that the developed system can adapt to changing work-zone environments smoothly
under various congestion patterns on the road.
Maitipe, Buddhika; Hayee, M. Imran.
Development and Field Demonstration of DSRC-Based V2I Traffic Information System for the Work Zone.
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