A speed restriction sign:

  1. May be ignored in rainy, snowy, or icy conditions.
  2. Has a triangular shape.
  3. Is blue with black lettering.
  4. Shows a recommended speed for a curve or turn. ✓

Answer: D. Shows a recommended speed for a curve or turn.

A speed restriction sign shows a recommended speed for a curve or turn.

Why this is the answer

The handbook describes the advisory speed sign as telling you the highest speed you can safely travel around the curve or turn ahead. It is tied to the shape of the road, so the number reflects what the curve or turn itself allows rather than the posted limit on the straight stretch. That makes it a recommended speed for that curve or turn. The handbook does not say the sign can be disregarded when the weather turns bad — in fact it warns you to slow down on wet road.

Why the other answers are wrong

Remember it

Match the number on the sign to the curve or turn you are about to drive, not to the straight road you are leaving.

Official handbook: Texas Driver Handbook (DL-7), Chapter 5: Signals, Signs, and Markers , p. 30

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.