Where our signs come from

Every sign, meaning and rule on this site traces back to a public source you can check.

The federal standard

US road signs are set by the Manual on Uniform Traffic Control Devices (MUTCD), published by the Federal Highway Administration. We follow the 11th edition, published on December 19, 2023 and in effect since January 18, 2024. States had until January 18, 2026 to adopt it or a state version that matches it.

The sign images

All 87 sign images are public-domain drawings of MUTCD signs from Wikimedia Commons; each sign page links to its file. Where Commons names work-zone files CW20/CW21, those are the orange versions of MUTCD W20/W21 signs. The official sign designs are FHWA's Standard Highway Signs.

How we check

• Every sign carries its MUTCD code, so you can look it up.
• Each drawing was compared by eye with its name before it went in, and every question is built from the same list, so a sign can never have two different meanings on the site.
• Automated tests make sure no question has two right answers.
• Rules that differ by state (such as when you may turn on red) are described generally; your state's handbook has the exact rule.

Practice, not the official test

We are not affiliated with any DMV or government agency. Your state's driver handbook and knowledge test are the official source.

Found a mistake?

Tell us which sign and what looks wrong on the contact page. We fix sign errors first. More about who we are is on the about page.