Samenvatting
Security and reliability of traffic signal installations are being safeguarded by various devices for correct operation and against dangerous situations. The operation of the safety system is described.
Security and reliability of traffic signal installations are being safeguarded by various devices for correct operation and against dangerous situations. The operation of the safety system is described.
Strassen Verkehrs Technik, Vol. 16 (1972), No. 2, p. 39-43 ref.
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