When you want to change lanes, you should never:

1. Move into another lane while within an intersection. ✓
2. Check your blind spot by looking over your shoulder.
3. Check for other drivers moving into the same lane.

Answer: A. Move into another lane while within an intersection.

You should never move into another lane while you are within an intersection.

Why this is the answer

The handbook's lane-change checklist has you signal, check mirrors, check traffic behind and beside you, and look over your shoulder before you move, and it warns against letting the vehicle drift into another lane. It also tells you that once you start moving through an intersection, you keep going. The safe place to make a lane change is on the open road where you can see and signal ahead of time, not inside an intersection where your attention and space are already tight.

Why the other answers are wrong

• B. Check your blind spot by looking over your shoulder. — Looking over your shoulder in the direction you plan to move is exactly what the handbook tells you to do to make sure the lane is clear.
• C. Check for other drivers moving into the same lane. — Watching for other drivers who may be moving into the same lane is part of checking traffic beside you, which the handbook lists as a step before changing lanes.

Remember it

Picture the intersection as a place to finish what you started: pick your lane before you enter and hold it until you are through.