Line of sight pre-emption emitters use a low priority signal at which frequency?

Line of sight pre-emption emitters utilize a low priority signal at a frequency of 10 hertz. This frequency is specifically chosen because it allows the emitter to effectively communicate with traffic control systems without causing signal interference with other operational frequencies. A 10 hertz signal strikes a balance, providing enough signaling capacity to alert traffic control systems of the presence of emergency vehicles while minimizing the chances of disruption to regular traffic signals. Understanding the frequency range used for pre-emption tasks is crucial for ensuring that emergency vehicles can navigate through traffic safely and efficiently. In contrast, the other frequencies mentioned do not align with the standard practices for low priority signals used in these systems.