MS4 off-road research summary report /
Cooper, B. R.
Freeman, M.
Mitchell, J.
TRL Limited.
Great Britain.Highways Agency.Traffic Systems and Signing Division.
Crowthorne, Berkshire, England : Transport Research Laboratory,
2004.
"Prepared for Safety and Information Division, Highways Agency."
Includes bibliographical references.
Electronic traffic controls.
Intelligent Vehicle Highway Systems
variable message signs