Effectiveness of Changeable Message Signs in Controlling Vehicle Speeds in Work Zones: Phase II - Final Report 12/02/1998
Department for Transport: A cost recovery system for speed and red-light cameras - two year pilot evaluation 02/12/2003
Department for Transport: A cost recovery system for speed and red-light cameras - two year pilot evaluation 02/12/2003
Midwest States Smart Work Zone Deployment Initiative: MwSWZDI Technology Evaluations Year One - Chapter 5: Nebraska - SpeedGuard Radar Speed Reporting System 05/02/2000
A Study on the Effect of Automated Speed Enforcement Systems on Traffic Flow Characteristics 10/13/1998
Increase of Traffic Safety by Surveillance of Speed Limits with Automatic Radar-Devices on a Dangerous Section of a German Autobahn: A Long-Term Investigation 01/02/1984