Research problem statements operation and maintenance of transportation facilities.

Research problem statements operation and maintenance of transportation facilities.

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Manylion Llyfryddiaeth
Awdur Corfforaethol: National Research Council (U.S.). Highway Research Board
Fformat: Llyfr
Iaith:English
Cyhoeddwyd: Washington, D.C. Highway Research Board, National Research Council [1972]
Cyfres:Highway Research Circular no. 131.
Pynciau:
Highway safety > Research.
Traffic Measurement > Research.
Traffic control and operations > Research.