When changing lanes, you should:

Question

Before changing lanes, make sure no other drivers are going to be in your path. Do this by checking your mirrors and looking over your shoulder in the direction you want to move.

Accepted Answer

Use your mirrors and look over your shoulder.

Answer

Use your mirrors. You do not need to look over your shoulder unless you notice something unusual.

Answer

Either use your mirrors or look over your shoulder.

When changing lanes, you should:

Wait, before you go