This document presents results from the light-vehicle and heavy-truck field operational tests performed as part of the Integrated Vehicle-Based Safety Systems (IVBSS) program. The findings are the result of analyses performed by the University of Michigan Transportation Research Institute to examine the effects of a prototype integrated crash warning system on driver behavior and driver acceptance. Both platforms included three integrated crash-warning subsystems: forward crash; lateral drift (LDW); and lane-change/merge crash (LCW) warnings. The light-vehicle platform also included curve-speed warning.
Arbitrate driver warnings to prevent confusion. In both light and heavy vehicle platform testing, a need was found to arbitrate driver warnings to prevent confusion in cases where multiple warnings are presented in multiple threat the scenarios. The study found drivers often respond appropriately to the first warning, but it is unclear how immediate, subsequent warnings were received and responded to.