MUTCD W16-10P · Warning signs
Supplemental plaque with photo enforcement symbol
What it means
Supplemental plaque with photo enforcement symbol.
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 W16-10P.)
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 warning signs series — the ones most easily mixed up with it.
- W16-8aP Advance street name plaque with double arrow
- W16-8P Advance street name plaque
- W16-9P Supplemental plaque indicating 'Ahead'
- W16-10aP Supplemental plaque indicating photo enforcement
- W16-11P Supplemental plaque indicating High Occupancy Vehicle (HOV)
- W16-12aP Supplemental plaque for roundabout junction
