When atmospheric conditions reduce visibility on the roadway to ___________, the strobe light on a school bus may be activated.

When atmospheric conditions reduce visibility on the roadway to 500 feet, it is necessary to activate the strobe light on a school bus to enhance its visibility to other drivers. The strobe light serves as an important safety feature, alerting surrounding vehicles to the presence of the school bus, especially in low-visibility conditions such as fog, heavy rain, or snow. This regulation is aimed at ensuring the safety of children boarding or disembarking from the bus, as well as the protection of school bus drivers.

Using the strobe light at this distance helps to mitigate the risk of accidents by ensuring that the bus is more noticeable to other motorists who may otherwise have difficulty seeing it. This regulation emphasizes the importance of proactive safety measures in transportation, particularly when it comes to the safety of children on school buses.