MUTCD R5-5 · Regulatory signs
Prohibits vehicles with lugs that can damage pavement
What it means
Prohibits vehicles with lugs that can damage pavement.
What to do about it
It is a regulatory sign: it states a law you must obey, not a suggestion. Ignoring it is a citable violation. (MUTCD R5-5.)
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 regulatory signs series — the ones most easily mixed up with it.
- R5-2aP Allows local delivery trucks despite general truck prohibition
- R5-2b Prohibits through truck traffic; local delivery permitted
- R5-3 Prohibits access to all motorized vehicles
- R5-4 Prohibits commercial vehicle traffic
- R5-6 Prohibits bicycle access
- R5-7 Prohibits non-motorized vehicles including bicycles and carts
