Final answer:
A steady yellow light over a toll booth signifies to prepare to stop as the lane might close or there's an alert. The wire in the pavement detects vehicles approaching the toll booth and traffic signals help in enforcing speed limits and safety.
Step-by-step explanation:
A steady yellow light over a toll booth typically warns drivers that they should prepare to stop, as the toll booth lane is about to close or that there is some type of alert condition they need to be aware of. This system helps manage the flow of traffic and ensures drivers can anticipate the need to select another lane in a timely manner, thereby reducing the risk of abrupt stops or collisions. However, the specific meaning can vary by location, so drivers should always be aware of the local traffic rules and signs.
The wire in the pavement before toll booths is used as a traffic signal preemption device or as a sensor to detect approaching vehicles, allowing the toll booth to prepare for a vehicle's arrival or to activate signals that manage the flow of traffic. Additionally, traffic signals play a crucial role in maintaining safety and enforcing the speed limit. For example, they can prevent vehicles from speeding through intersections, thus promoting an orderly flow of traffic and minimizing the risk of accidents.