National Highway Traffic Safety Administ

This report describes the system capability assessment for the Cooperative Intersection Collision Avoidance System for Violations (CICAS-V) based on data collected from objective tests and a pilot test. The CICAS-V is a vehicle-to-infrastructure system that provides visual, audio, and haptic (brake pulse) warnings when a vehicle is in danger of violating a traffic signal or stop sign at an intersection. A series of objective tests were conducted at the Virginia Tech Transportation Institute. Each test was defined by an initial geometry, a set of validity constraints (such as the sufficient GPS accuracy), and a set of pass/fail criteria. The test series investigated the ability to appropriately warn or not warn at various speeds, in appropriately discerned lanes, under dynamic lane changes, under changing signal conditions, and in the presence of multiple equipped intersections. A pilot test was run with nearly 100 na ve drivers on a two-hour prescribed course in the Blacksburg, VA area.

This report documents the results of the independent evaluation's assessment of the driver acceptance of the Cooperative Intersection Collision Avoidance System limited to Stop Sign and Traffic Signal Violations (CICAS-V) system as tested during a pilot test in 2008. The purpose of this pilot test was to use na ve participants in on-road and test-track environments to assess the readiness and maturity of the CICAS-V for a large-scale field operational test. Data were evaluated from 87 naive drivers who were placed into equipped vehicles to navigate a two-hour prescribed route through ten stop-controlled and three signal-controlled equipped intersections. To ensure the data were sufficient to understand drivers' impressions of the warning, 18 drivers followed the on-road study with a test-track study.