MUTCD CW24-1bL · Work zone signs
Double reverse curve to the left for 3 lanes in work zone
What it means
Warns of double reverse curve to the left for 3 lanes in work zone.
What to do about it
It is a warning sign: the yellow diamond warns of a condition ahead so you can slow down and be ready before you reach it. (MUTCD CW24-1bL.)
Practice this on the real test format
Signs are the part of the DMV written test people fail on, because reading them is a skill rather than a fact to memorize. Aprobify drills all 1034 of them, and tells you why each answer is what it is.
Get the appSign designations follow the MUTCD and the California MUTCD published by Caltrans; meanings are checked against the California Driver's Handbook (DL 600, rev. 6/2025). Edited by Fernando Aguilera. Aprobify is not affiliated with the California DMV.
Signs in the same family
These sit next to it in the work zone signs series — the ones most easily mixed up with it.
- CW22-1 Blasting zone at specified distance ahead
- CW22-3 End of blasting zone
- CW24-1aL Double reverse curve to the left for 2 lanes in work zone
- CW24-1aR Double reverse curve to the right for 2 lanes in work zone
- CW24-1bR Double reverse curve to the right for 3 lanes in work zone
- CW24-1cP Supplemental plaque indicating all lanes affected in work zone
