If railroad tracks are marked "EXEMPT", what does it indicate for drivers when the red lights are flashing?

When railroad tracks are marked "EXEMPT," it indicates that drivers do not have to stop at the crossing, even when the red lights are flashing. This exemption typically applies to certain types of vehicles or situations, such as certain trucks or school buses that operate under specific circumstances where the crossing is considered safe to pass without stopping. It is essential for drivers to be aware of these markers and understand that while safety protocols at railroad crossings usually require stopping when signals are active, an exemption signal allows for continued movement provided it is safe to do so. Always exercise caution and be vigilant for any additional instructions or signs that may affect the crossing.