Connected vehicle GID transmission and reception test with DSRC

Cooperative Intersection Collision Avoidance System (CICAS) program uses roadside radar sensors, a computer processor and algorithms to determine unsafe conditions, and an active LED icon based sign to provide timely alerts and warnings which are designed to reduce the frequency of crashes at rural expressway intersections. The cooperative component of the CICAS system consists of roadside equipment (RSE), on-board equipment (OBE), geospatial information database (GID) and intersection sign state (ISS). Both the RSE and OBE use dedicated short range communication (DSRC) radios operating on the 5.9GHz band. For the tests described in this paper, the supplier of the DSRC radios is Arada. The tests documenting performance were done at the CICAS test intersection located at the intersection of U.S. 169 and County State Aid Highway 13 north of Milaca, MN. The goal of this test was to determine the efficacy with which information can be broadcast from the RSE and received by the OBE as a function of direction and distance of travel from the intersection. The result is it is sufficient to ensure that approaching vehicles will receive a complete GID in sufficient time for its intended use.