Over four days in the summer of 2018, a watershed moment in the maturation of connected vehicle technologies occurred at the Turner-Fairbank Highway Research Center (TFHRC), a federally owned and operated national research facility in McLean, Virginia. Through a collaborative effort, the United States Department of Transportation (USDOT) and three Connected Vehicle (CV) Pilot Demonstration sites— New York City, Wyoming, and the Tampa Hillsborough Expressway Authority (THEA)—conducted an interoperability test to demonstrate if a vehicle with an onboard device from one of the sites was able to receive messages from onboard units (OBUs) and roadside units (RSUs), between each CV Pilot site, in accordance with the key connected vehicle interfaces and standards. A test of this nature, involving three deployment sites and five device vendors had never been done before.
Working with the USDOT and its contractors, the CV Pilot sites collaborated to harmonize the data elements that would make such interactions possible, establish the security profiles, and agree on interpretations of the various standards for connected vehicle systems. Coming into the test, participants were eager to see if all the planning and coordination over six months paid off—and it did.
In total, over one hundred interoperability test runs were conducted for four test application-based cases—Forward Collision Warning (FCW), Intersection Movement Assist (IMA), Emergency Electronic Brake Lights (EEBL), and reception of vehicle-to-infrastructure (V2I) signal phase and timing (SPaT) and MAP messages. Results of the testing indicated successful transfer of messages between devices located on six vehicles—from five different vendors—and between in-vehicle devices and roadside units (RSUs). All devices used for the test were enrolled with a commercial Security Credential Management System (SCMS) and used test certificates from the SCMS to ensure trusted communication between OBUs and RSUs. Based on the testing, it was concluded that all vendors and CV Pilot site deployment configurations were interoperable and could trigger warnings in each others’ devices.
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