This report presents results from the independent evaluation of a field operational test using a fleet of heavy trucks outfitted with a prototype integrated crash warning system. This effort was conducted as part of the U.S. DOT's Integrated Vehicle-Based Safety Systems (IVBSS) program. The system tested included rear-end, lane-change/merge, and lane departure crash warning functions. The goals of the evaluation were to assess safety impact and driver acceptance, and to characterize the prototype system's warning capabilities. Eighteen volunteer drivers from a commercial fleet operated the 10...