
The Mirror–Signal–Maneuver Routine is a systematic approach used by drivers to enhance road safety. It involves first checking mirrors to assess the surrounding traffic, then signaling intentions to alert other road users, and finally executing the intended maneuver, such as changing lanes or turning. This routine helps prevent accidents by ensuring that drivers are aware of their environment and communicate their actions clearly before making any movement on the road.

The Mirror–Signal–Maneuver Routine is a systematic approach used by drivers to enhance road safety. It involves first checking mirrors to assess the surrounding traffic, then signaling intentions to alert other road users, and finally executing the intended maneuver, such as changing lanes or turning. This routine helps prevent accidents by ensuring that drivers are aware of their environment and communicate their actions clearly before making any movement on the road.
What is the Mirror–Signal–Maneuver routine?
A driver safety sequence: first check mirrors to assess traffic, then signal your intent, and finally execute the lane change or turn safely.
Why is checking mirrors the first step?
It helps you detect vehicles in adjacent lanes and behind you, so you know when it’s safe to signal and move.
When should you use this routine?
Before changing lanes, turning, or merging—any planned move that affects other road users.
What should you do after signaling?
Re-check mirrors and blind spots, confirm the path is clear, adjust speed if needed, and proceed only when safe.