Delwedd Flaen

Research problem statements operation and maintenance of transportation facilities.

Manylion Llyfryddiaeth
Awdur Corfforaethol: National Research Council (U.S.). Highway Research Board
Fformat: Llyfr
Iaith:Saesneg
Cyhoeddwyd: Washington, D.C. Highway Research Board, National Research Council [1971]
Cyfres:Highway Research Circular no. 129.
Pynciau:
Highway safety > Research.
Traffic Measurement > Research.
Traffic control and operations > Research.