Slower Traffic Keep Right Sign
Slower vehicles must stay in the right lane so faster traffic can pass
In short: A Slower Traffic Keep Right sign means vehicles moving slower than surrounding traffic must use the right lane, leaving the left lane free for passing. If cars are overtaking you on the right, you belong one lane over.
What to do
If you are moving slower than surrounding traffic, move to the right lane.
Tips
The left lane is for passing, not cruising.
Test yourself
You see this sign while driving. What do you have to do?
Show the answer
If you are moving slower than surrounding traffic, move to the right lane.
Common mistake
Blocking the left lane while driving slowly
How to recognize this sign
Also searched as slower traffic keep right sign meaning, keep right except to pass, or left lane law.
About regulatory signs
Regulatory signs are usually white rectangles with black or red markings, and they carry the force of law — speed limits, turn restrictions, right-of-way. Ignoring one is a traffic violation. The written test regularly checks whether you know exactly what a regulatory sign requires you to do.
Practice questions about this sign
This sign instructs drivers to:
- A. Always drive in the right lane regardless of speed
- B. Move to the right lane if driving slower than surrounding traffic
- C. Increase speed to match traffic flow
- D. Use the right lane only when exiting
Show answer
B. Move to the right lane if driving slower than surrounding traffic — Slower vehicles keeping right allows faster traffic to pass safely in the left lane, which reduces unsafe passing maneuvers on multi-lane roads.
Universal rule · checked against MUTCD 11th Edition, Part 2 — Signs (General) — Traffic Signs — General · verified 2026-08-01
Frequently asked questions
What does the Slower Traffic Keep Right Sign mean?
Slower vehicles must stay in the right lane so faster traffic can pass
What should you do at a Slower Traffic Keep Right Sign?
If you are moving slower than surrounding traffic, move to the right lane.
Reference standard: Federal Highway Administration Manual on Uniform Traffic Control Devices ↗. State and local agencies may add rules or operating times, so follow the complete posted sign where you drive. How DMV Prep sources content.
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