Description: Based on the results of this study, a recorded CB message near the beginning of a lane closure on an interstate highway work zone can be expected to be heard and understood by a high proportion of truck drivers. There is strong evidence that truck drivers appreciate the warning and will adjust their lane choice based on the warning. The effect of the warning on speed and speed variance is less certain. There may be some beneficial effect on speed and speed variance near the beginning of the lane closure, but the results are inconclusive.
The primary costs of the CB Wizard Alert System include the system itself and staff time for installation, recording the message, and removal. No lane closures are required as the system is installed, operated, and removed without traffic disruption.
Report: MwSWZDI-2000-Virkler-CB_Wizard_Alert_System.pdf 1.3 mb (published 2000)
State conducting research: Missouri