Control and monitoring of operations from central station by closed-circuit TV cameras installed at major ramp areas; installation of traffic control devices along reversible-direction section of Seattle Freeway, including motorized gates, barriers and changeable-message illuminated signs; transmission of operational signals by composite communication cables with coaxial core.
Central control operates 12-lane freeway
Elec Construction Maintenance
Electrical Construction and Maintenance ; 65 , n 4 ; p 135-137
1966
3 pages
Article (Journal)
English
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