This paper reports on the status of the evaluation of several lane change collision avoidance systems (CAS) types using the National Advanced Driving Simulator (NADS). The goal of this evaluation is to examine driver behavior with a variety of lane change CAS to determine what leads to the safest driver behavior, and to investigate if the use of a lane change CAS with only a proximity warning system (i.e., blind spot detector) provides sufficient warning to drivers. The study begins with a comprehensive review of literature in this area. Then, simulator test scenarios are developed for the NADS to examine and compare five lane change CAS types, namely a representative commercially available proximity warning system, the TRW proximity only CAS, the TRW comprehensive system, a nonplanar mirror on the left (driver’s) side of the vehicle, and a baseline with standard passenger vehicle mirrors. The test scenarios are based on Sen, Smith, and Najm [1] lane change crash data analysis. Preliminary results on the driver’s acceptance of the lane change CAS and decision to use CAS information in making lane change decisions are presented. This research is still in progress and is planned to be completed in mid 2005.