MUTCD R12-4 · Regulatory signs
Both per axle and gross weight limits for vehicles
What it means
Indicates both per axle and gross weight limits for vehicles.
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 R12-4.)
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.
- R11-3b Bridge is out ahead at specified distance, allowing only local traffic
- R11-4 Road is closed to through traffic but may allow local access
- R12-1 Maximum weight limit for vehicles on the roadway
- R12-2 Maximum weight limit per axle for vehicles
- R12-5 Weight limits specifically for trucks with visual truck symbols
- R12-6 Weight limits for special hauling or oversized vehicles
