Practice question

What is the Bus Interface Unit (BIU) in a TS 2 traffic signal cabinet?

  1. A device that connects the cabinet to public transit vehicles
  2. The TS 2 serial-bus interface to cabinet devices
  3. A backup power interface for battery systems
  4. A network router that connects the cabinet to the internet

Answer: B — The TS 2 serial-bus interface to cabinet devices

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