What should drivers do in bumper-to-bumper traffic when an emergency vehicle approaches?

When an emergency vehicle approaches in bumper-to-bumper traffic, drivers should form a passageway in the middle. This action allows the emergency vehicle to maneuver through the traffic and reach its destination as quickly as possible. Forming a passageway involves moving vehicles to the left and right sides of the road, creating a lane in the center for the emergency vehicle. This is particularly crucial in heavy traffic situations, where simply stopping or remaining in place may prevent the emergency vehicle from reaching those in need of assistance promptly.

The other choices do not facilitate the movement of emergency vehicles effectively. Remaining still can block access and prolong delays for emergency responders. Moving only to the left lane might not provide enough space for the emergency vehicle, particularly if traffic is also trying to flow. Accelerating to clear the lane can be dangerous, as it may create chaos and lead to accidents rather than safety. Thus, forming a passageway is the best practice in this scenario.