A vehicle passing a stationary authorized emergency vehicle on a two-lane roadway with lights activated must slow to what speed?

When a vehicle approaches a stationary authorized emergency vehicle on a two-lane roadway that has its lights activated, the law requires drivers to reduce their speed to ensure safety for both the emergency personnel and other road users. The reason for reducing speed is to minimize the risk of accidents, as emergency vehicles are often engaged in critical and potentially dangerous situations.

The correct answer indicates that drivers must slow down to 20 MPH below the posted speed limit. This specific speed reduction gives ample room for the emergency personnel to operate safely and allows the passing vehicle to maintain control while navigating past the scene. The requirement reflects a balance between maintaining traffic flow and ensuring the safety of those attending to emergencies.

This rule is essential, as it promotes awareness and caution when driving near emergency situations, contributing to safer roadways for everyone involved.