This paper identifies and analyzes violations associated with intersection-crossing-path crashes for the purpose of providing support for development of effective collision avoidance countermeasure systems including the Cooperative Intersection Collision Avoidance System for Violation (CICAS-V) project. The methodology begins by addressing multi-vehicle crashes at intersection / intersection-related junctions subdivided by their respective traffic control devices. This is followed by translating crashes into subsets of two-vehicle crossing-path crashes and analyzing them in detail for their respective violations at various traffic control devices.

The analysis utilizes 2004 General Estimating System (GES) national crash data-files to arrive at the quantitative estimates. There were 1,035,000 twovehicle- crossing-path crashes at intersections. A majority of the crashes involved vehicles at Straight crossing-paths followed by vehicles at Left turn across path / Opposite direction and Left turn across path / Lateral direction. The analysis provides adequate evidence of violators, the major contributors being Failure to Yield, which is due to the misjudgment of gap, and Running a red light /Stop Sign. Nearly half the crashes were at signalized intersections and the remaining at non-signalized intersections. For vehicles at Stop Signs, a majority of them were at a two-way Stop Sign.

The paper uses a novel approach by addressing pairs of vehicles and their interactions with each other at crossing-paths. The paper approaches violations by looking at the number of violating vehicles involved in each multi-vehicle crash situation. Pre-crash movement, critical event, and the type of traffic control device are utilized to identify the violating vehicle in each of these situations.