When using GPS based traffic signal preemption, what requirement must be met for operation?

The operation of GPS-based traffic signal preemption relies on having an active transmitter in the vehicle. This transmitter sends signals to traffic management systems to indicate the vehicle's approach, allowing for adjustments to traffic signals to facilitate smoother and safer passage for emergency or priority vehicles. Having the transmitter turned on is essential because it is the method through which the vehicle communicates its location and the need for signal change to the traffic control system. If the transmitter is not operational, the system cannot recognize the vehicle or respond appropriately to alter traffic signals.

This mechanism enhances efficiency and safety, especially for emergency responders who may need to navigate through traffic quickly. Therefore, ensuring the transmitter is active is critical for the system to function as intended.