Speed Limit Sign — Meaning

By DMV Master Editorial Team Updated April 28, 2026 Also: SPEED LIMIT

Category: Regulatory
Shape: Vertical Rectangle
Colors: Black, White
Text: SPEED LIMIT [number]
MUTCD Code: R2-1

What does the Speed Limit Sign mean?

The Speed Limit sign is a white rectangle with black "SPEED LIMIT" text and a numerical maximum legal speed below it. The posted number is the absolute maximum speed allowed on that road under ideal conditions; drivers must reduce speed in poor weather, traffic, or visibility.

What to do when you see this sign

1
Do not exceed the posted speed limit under any circumstances
2
Reduce speed in rain, snow, fog, or heavy traffic — even below the limit
3
Anticipate speed limit changes when entering towns, school zones, or construction areas
4
Use cruise control on long stretches to maintain steady, legal speed

Where you'll see it

On every type of public road, posted at intervals
After a road condition change (entering a town, leaving a highway)
At the entrance to school zones (often with reduced limits)
Beginning and ending speed-limit zones

Test trap: don't get caught by this

Speed limits are MAXIMUMS, not targets. Driving below the limit is legal; driving above it — even by 5 mph — is a traffic violation. Conversely, going TOO slow on a highway can also be ticketed (impeding traffic).

Practice questions about the Speed Limit Sign

Test your knowledge with real DMV-style questions, each with the correct answer and explanation.

What does a Speed Limit sign indicate?

View answer & explanation

What color are regulatory signs (like speed limits and no-turn signs)?

View answer & explanation

When you see a school zone sign with a speed limit, what must you do?

View answer & explanation

States that test this sign

The Speed Limit Sign appears in DMV practice tests for 50 states. Click any state to see its full DMV practice page.

Frequently asked questions

Is the speed limit a recommendation or a strict maximum?

A strict maximum. Exceeding it by any amount is a traffic violation, regardless of road conditions or how other traffic is moving.

Can I drive below the posted speed limit?

Yes — the limit is a maximum. However, on highways, driving substantially below the flow of traffic can create a hazard and may be ticketed as "impeding traffic."

How often are speed limit signs posted?

Generally every 1/4 to 1/2 mile in urban areas, and at the start of every new speed zone. State DOT manuals govern exact placement.