Practice question

What is the difference between a 'call' and 'demand' in signal operations?

  1. A call refers to telephone communication with dispatch; demand refers to traffic volume
  2. They are essentially the same term — both indicate a request for service on a phase
  3. A call is a pedestrian request; demand is a vehicle request
  4. A call overrides preemption; demand does not

Answer: B — They are essentially the same term — both indicate a request for service on a phase

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