;Contents: Traffic operation (Traffic surveillance and control, Stoppages, Overheight vehicles, Hazardous cargoes, Lane closures for maintenance, Communications, Unmanned facilities); General maintenance (Tunnel washing, Lamp replacement, Personnel, Night work, Seepage, Other maintenance); Lighting and power supply (Lighting, Power sources); Ventilation (Fan operation, Monitoring equipment); Costs.
Highway Tunnel Operations
1975
39 pages
Report
No indication
English
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