MUTCD R14-1 · Regulatory signs
Designated truck route for commercial vehicles
What it means
Indicates a designated truck route for commercial 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 R14-1.)
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 regulatory signs series — the ones most easily mixed up with it.
- R12-6 Weight limits for special hauling or oversized vehicles
- R12-7 Weight limits that apply to emergency vehicles
- R12-7aP Supplemental plaque indicating weight limits for emergency vehicles
- R13-1 Requires trucks over 10 tons to enter the weigh station at the next right exit
- R14-2 Designated route for vehicles carrying hazardous materials
- R14-3 Prohibits vehicles carrying hazardous materials from using the route
