An evaluation of warning and regulatory signs for curves on rural roads /
Richard W. Lyles ; Social Science Research Institute, University of Maine, Orono ; Maine Dept. of Transportation.
|Main Author:||Lyles, R. W.|
Washington : Federal Highway Administration, Offices of Research & Development ; 1980.
Signs and signboards.
Prepared by Richard W. Lyles and J.H. Wyman ; University of Maine-Orono Social Science Research Institute, Maine Department of Transportation Materials and Research Division.
Contract no. DOT-FH-11-9401.
Final report; issued March 1980.
33 p. :
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