What must a driver do if they wish to change lanes?

To safely change lanes, a driver must check their mirrors and blind spots before signaling and moving over. This sequence is crucial for ensuring that the lane is clear of other vehicles or obstacles that may not be visible in the mirrors alone.

Checking mirrors provides broader visibility of surrounding cars, while looking into blind spots accounts for vehicles that might be out of the mirror's range — typically those directly behind and to the sides of the vehicle. Signaling informs other drivers of an impending lane change, helping to maintain safety on the road. Thus, performing these actions in the correct order enhances overall driving safety, reduces the risk of accidents, and ensures compliance with traffic laws, which require drivers to signal their intentions before making maneuvering changes.