MUTCD G20-1 · Work zone signs
Road work ahead at specified distance in miles
What it means
Indicates road work ahead at specified distance in miles.
What to do about it
It is a guide sign: guide signs give directions, distances and services. They do not impose a rule, but reading them early keeps you out of last-minute lane changes. (MUTCD G20-1.)
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.
- 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
- CW24-1L Double reverse curve to the left for 1 lane in work zone
- CW24-1R Double reverse curve to the right for 1 lane in work zone
- G20-2 End of road work zone
- G20-4 Follow the pilot car through construction zone
