Road signs in Puerto Rico are regulated in the Manual de Rotulación para las Vías Públicas de Puerto Rico, Puerto Rico’s supplement to the Manual on Uniform Traffic Control Devices (MUTCD), the standard for road signs, signals, and markings in the United States.
[1] Puerto Rico is among the territories of the United States to have adopted the national MUTCD in conjunction with a supplemental volume.
Regulatory signs give instructions to motorists, pedestrians, and cyclists.
Signs including Stop, Yield, No Turns, No Trucks, No Parking, No Stopping, Minimum Speed, Right Turn Only, Do Not Enter, Weight Limit, and Speed Limit are considered regulatory signs.
Local variations occur with additional information and slightly different designs.
No Parking signs indicate that loading or unloading while temporarily stopped is permitted, but the driver must not leave the vicinity of the vehicle.
These signs are specified by the MUTCD to be red on white, although local variations occur.
No Standing signs indicate that stopping temporarily to load or unload passengers is allowed, but vehicles cannot be stopped at the location for longer periods of time, even if the driver remains with the vehicle.
They highlight existing conditions, such as a curve, school, dead end street, or traffic signal.
They can also warn of possible danger such as bumps, bicycles, low flying aircraft, or emergency vehicles.
Most W series signs can also be found with orange backgrounds for temporary use in situations such as construction zones.
The MUTCD allows use of a fluorescent yellow-green background color for signs relating to non-motorized vehicles crossing the road.
As of 2009 the MUTCD requires school warning signs to have fluorescent yellow-green backgrounds.