Traffic Signals 101

Topic 5

Cabinets

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Cabinets

• Traffic Signal Cabinet and Signal Service Cabinet

Traffic Signal Cabinet

Signal ServiceCabinet

Concrete Pad

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• Traffic Signal Cabinet and Signal Service Cabinets

Close-up of SignalService Cabinet

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Cabinets

• Field Wiring in Traffic Signal Cabinet

IndicationHook-ups

Indication returns and grounds

Loop/PPBHook-ups

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Cabinets

• Typical Traffic Signal Cabinets

“R” Cabinet(77” height)

“P” Cabinet(60” height)

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• Power Panel

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Cabinets

• Cabinet Fans/Convenience Light Panel

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Cabinets

• Detector Interface Panel

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Cabinets

• Detector Amplifier Rack

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• Controller Interface / Load-Switch / Flash Transfer Relay Panel

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Cabinets

• Auxiliary Interface Panel

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Cabinets

• Loop/Pedestrian Push-Button Hook-up Panel

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• Auxiliary panel

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Cabinets

• Police panel

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Cabinets

• HANDOUT - typical Cabinet Print (3 pages)