Abstract
This paper describes conceptual outlines of possible infrastructure intersection collision avoidance systems. The infrastructure concepts represent countermeasures for crossing path crashes at intersections. Crossing path crashes involve one vehicle cutting across the path of another, both initially travelling from either perpendicular or opposite directions, in such a way that they collide. Infrastructure-based intersection collision avoidance systems use roadside sensors, processors, and warning devices; roadside-vehicle communication devices; and traffic signals to provide driving assistance to motorists.