Before changing lanes to the left, what should you do if the left is free but a car is behind?

When preparing to change lanes to the left, it is essential to ensure that the lane is clear of any vehicles, especially when there is a car following closely behind you. Checking your left mirror and turning your head to the left allows you to verify that there are no obstacles or vehicles in your blind spot, which may not be visible in your mirror. This ensures that it is safe to proceed with the lane change.

By accurately assessing your surroundings, you can make informed decisions that prioritize your safety and the safety of others on the road. Proper observation techniques are crucial when making any lane change, especially considering the potential risks associated with a vehicle trailing behind. This careful approach helps prevent collisions and ensures a smooth transition into the new lane.