WONDER #1947: How Does a Traffic Light Work?
Question 1 of 3
Which type of traffic signal sensor uses a coil of wire embedded in the road surface?
- inductive loop
Question 2 of 3
In areas with consistent, heavy traffic, signals may simply run on what?
Question 3 of 3
Which of the following is NOT a type of vehicle that might use a traffic signal preemption system?
- fire truck
- police car
- dump truck
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