When changing lanes you should not:

  1. Check your side and rearview mirrors.
  2. Give a turn signal to signal your intentions.
  3. Check for other drivers who may be moving into the same lane as you.
  4. Use your cell phone to contact the police to determine if the road ahead is clear. ✓

Answer: D. Use your cell phone to contact the police to determine if the road ahead is clear.

When changing lanes, you should not use your cell phone to contact the police to determine if the road ahead is clear.

Why this is the answer

The Texas handbook says you may use a cell phone to contact law enforcement or during an emergency, but if you must make a call, pull safely off the road first. It also says to avoid using a cell phone while driving because it can distract you. Calling police to ask whether the road ahead is clear is not a normal lane-change step, and it takes your attention away from driving. Checking mirrors, signaling, and watching for other drivers are proper preparations for a lane change.

Why the other answers are wrong

Remember it

Before a lane change, keep your hands on the wheel and your eyes on traffic; the phone stays out of it.

Official handbook: Texas Driver Handbook (DL-7), Chapter 9: Some Special Driving Situations , p. 54

Explanation drafted with AI (deepseek-flash) from the official handbook passage cited above, then checked automatically and by a second model on 2026-10-23. Always confirm with the official handbook.