Regulatory signs give notice of traffic laws or regulations. Familiar examples include STOP (R1-1), YIELD (R1-2), Speed Limit (R2-1), turn and lane-use controls, ONE WAY, DO NOT ENTER, WRONG WAY, parking controls, and restrictions for particular road users or vehicle classes.
At a glance
| Purpose | Common examples | Typical code family |
|---|---|---|
| Priority and right of way | STOP, YIELD, pedestrian yield/stop controls | R1 |
| Speed regulation | Speed Limit, minimum speed, higher-fines plaques | R2 |
| Movement and lane use | No turns, turn-only lanes, reversible and preferential lanes | R3 |
| Direction and roadway use | ONE WAY, keep right, divided-highway controls | R4 and R6 |
| Exclusions and prohibitions | DO NOT ENTER, WRONG WAY, vehicle restrictions | R5 |
| Parking and stopping | No Parking, limited-duration parking, loading rules | R7 and R8 |
How regulatory signs are recognized
Many regulatory signs are vertical rectangles with black legends on white backgrounds. Red is used where added emphasis or a prohibitory message is part of the standard design. STOP and YIELD are major exceptions with exclusive shapes and distinctive colors.
A sign and plaque can form one complete rule
Supplemental plaques may add a time, distance, vehicle class, direction, or exception. Read the primary sign and every associated plaque together. A plaque is not usually a standalone instruction.
Choosing the correct regulatory designation
Search the exact visible message first. Then compare symbols, arrows, line count, plaque wording, and orientation in the Sign Library. Similar-looking signs may serve different applications, so confirm the selected code and current official detail before use.
Frequently asked questions
What is a regulatory traffic sign?
It is a sign that gives notice of a traffic law or regulation.
Are all regulatory signs white rectangles?
No. Many are white rectangles, but STOP, YIELD, DO NOT ENTER, and other standardized signs use distinctive shapes or colors.
What letter begins most regulatory sign codes?
Most regulatory designations begin with R.