Evaluation of Low-Cost Safety Improvements Pooled Fund Study--Phase I

This research project will develop estimates of the effectiveness of safety improvements identified as strategies in the National Cooperative Highway Research Program Report 500 Guides through scientifically rigorous before and after evaluations. Phase I evaluations include: (1) STOP signs with increased retroreflectivity; (2) flashing beacons at stop-controlled intersections; (3) STOP AHEAD pavement markings; and (4) two-way, left-turn lanes.