TY  - BOOK
AU  - TRB / NCHRP
ED  - National Research Council (U.S.).
ED  - American Association of State Highway Officials.
ED  - United States.
TI  - Traffic control for freeway maintenance
T2  - NAS-NRC publication 1743
AV  - TE228 .N3 1969
U1  - 625.79 
PY  - 1969///
CY  - [Washington]
KW  - Roads
KW  - Maintenance and repair
KW  - Safety measures
KW  - Traffic signs and signals
N1  - "NCHRP project 20-5 FY '68."; "Research sponsored by the American Association of State Highway Officials in cooperation with the Bureau of Public Roads."; Bibliography: p. 36-37
ER  -