Question Move over laws require: Answers Trucks to use the left lane whenever possible. All vehicles to vacate the lane closest to an emergency vehicle that is stopped with its lights flashing. All vehicles to use the left lane whenever possible. All drivers to move into the left lane if a flatbed trailer is in the right lane. Explanation If you approach an emergency vehicle that is stopped with its lights flashing, you must move into a lane that is not next to the vehicle, if it is safe to do so. If you cannot change lanes, you must slow down and proceed with caution.