01810nam a2200409 a 4500 529626 529626 3000066 NUST 20190930104905.0 940324s1993 dcua 000 0 eng d 93086257 0309053145 (OCoLC)29410997 MSOHAIL DJBF DJBF DLC lccopycat TE228 .B69 1993 388.312 20 Bowman, Brian L. (Brian Lee), 1943- 21992 Supplemental advance warning devices / Brian L. Bowman. Washington, D.C. : National Academy Press, 1993. 83 p. : ill. ; 28 cm. Synthesis of highway practice / National Cooperative Highway Research Program, 0547-5570 ; 186 "Transportation Research Board, National Research Council." "Research sponsored by the American Association of State Highway and Transportation Officials in cooperation with the Federal Highway Administration." "Project 20-5 FY 1989 (Topic 21-09)"--T.p. verso. Includes bibliographical references (p. 78). Traffic signs and signals. 21132 Traffic safety. 19675 National Cooperative Highway Research Program. 20864 National Research Council (U.S.). Transportation Research Board. 19676 American Association of State Highway and Transportation Officials. 19553 United States. Federal Highway Administration. 20149 Synthesis of highway practice ; 186. 21993 7 cbc copycat 2 opcn 19 y-gencatlg ddc BK 0 0 ddc 0 0 NIT NIT 2019-09-30 0 388.312 NIT-10999 2019-09-30 2019-09-30 BK