When exiting a highway, you should slow down:

  1. On the main road, just before the exit lane.
  2. Once you see a toll booth.
  3. Once you have moved into the exit lane. ✓
  4. When you first see the exit sign.

Answer: C. Once you have moved into the exit lane.

Slow down once you have moved into the exit lane, using the exit ramp to reduce your speed before you rejoin local roads.

Why this is the answer

The Texas handbook handles leaving a highway in two steps: get into the correct lane well ahead of the exit, then slow down on the exit ramp. By the time you are off the highway you should already be at or under the new, lower speed limit. Slowing is tied to the exit ramp itself, after you have left the main travel lane, so the traffic behind you on the highway is not affected by your braking.

Why the other answers are wrong

Remember it

Two moves, two places: change lanes early, then brake on the ramp.

Official handbook: Texas Driver Handbook (DL-7), Chapter 9: Some Special Driving Situations , p. 48

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.