What must you do before changing lanes?

Before changing lanes, it is essential to check mirrors and blind spots. This action ensures that you’re aware of surrounding traffic conditions and can identify any vehicles that may not be visible in your mirrors. Blind spots are areas that your mirrors cannot cover, and failing to check these areas could result in a collision with another vehicle that is adjacent to you.

Checking mirrors allows you to see vehicles in adjacent lanes and assess their speeds, while observing blind spots involves physically turning your head to glance over your shoulder. This comprehensive assessment is vital for safe lane changes, enhancing your awareness of the driving environment and helping to ensure the safety of all road users.