If an emergency vehicle is on the side of the road with lights flashing, what must you do?

When an emergency vehicle is on the side of the road with its lights flashing, the appropriate response is to move a lane over or slow down if it is safe to do so. This action is crucial for several reasons. First and foremost, it ensures that emergency personnel can operate safely without the risk of being hit by passing vehicles. Moving over gives them more space to work and can be essential for their safety and the safety of those they may be assisting.

Moreover, slowing down is also important because it reduces the risk of an accident, especially since emergency situations often require quick movements and clear access. In many jurisdictions, there are laws in place, often referred to as "Move Over Laws," that require drivers to either change lanes or reduce their speed when approaching stationary emergency vehicles. This legal requirement emphasizes the priority of safety for both emergency responders and other road users.

The other options do not align with these safety principles. Speeding up to pass could lead to accidents, ignoring the vehicle can endanger lives, and stopping immediately could be hazardous to both the driver and other road users. Therefore, moving a lane over or slowing down is the correct and safest action in this situation.