Missouri's road sign test covers 20 common traffic and warning signs

When you renew your Missouri driver's license, the Department of Revenue will ask you to identify road signs as part of the written test. You will see 20 signs on a screen or paper, and you need to correctly identify at least 16 of them — that is an 80 percent pass rate. The signs tested are the ones you encounter regularly while driving: stop signs, yield signs, speed limit signs, one-way signs, and warning signs like curves ahead or pedestrian crossing.

The road sign portion is separate from the general knowledge section of the renewal test. If you are renewing by mail or online, you may not take a sign test at all — many mail and online renewals skip the written test entirely if your driving record is clean and you meet other conditions. If you renew in person at a Missouri license office, you will almost certainly take the written test, which includes the sign identification section.

You cannot study a published list of exactly which 20 signs will appear on your specific test, because Missouri rotates through a larger pool of signs. However, the signs that appear are always standard road signs you have seen while driving. There are no trick questions or obscure signs.

Key Takeaways

  • The road sign test shows you 20 signs and requires you to identify at least 16 correctly to pass.
  • You will only take a written test if you renew in person at a Missouri license office; mail and online renewals often skip the test entirely.
  • The signs tested are common traffic and warning signs you encounter on Missouri roads, not obscure or regional variations.
  • Missouri publishes a study guide that covers all possible signs that could appear, so you can prepare by reviewing that guide before your renewal appointment.
  • If you fail the sign test, you can retake it the same day or schedule another appointment; a failed sign test does not prevent you from renewing your license.

Where to find Missouri's official road sign study materials

The Missouri Department of Revenue publishes a free study guide called the Missouri Driver Guide, which includes a section on road signs. You can read this guide from the Missouri Secretary of State website at sos.mo.gov. The guide shows pictures of every sign that could appear on the test, along with what each sign means and when you will see it on the road.

The sign section of the guide is organized by category: regulatory signs (stop, yield, speed limit), warning signs (curves, pedestrian crossing, school zone), and informational signs (one-way, do not enter, parking). Each sign includes a brief explanation of what drivers must do when they see it. This is the same material the test is drawn from, so studying this guide directly prepares you for what you will encounter.

You do not need to memorize every detail about every sign. The test is multiple choice, so you will see the sign and four possible answers. Your task is to recognize which answer correctly describes what the sign means or requires you to do.

How the sign test works during your renewal appointment

When you arrive at a Missouri license office for an in-person renewal, you will be given a written test that includes the road sign section. The test is administered on a computer screen at most offices, though some locations still use paper tests. You will be shown one sign at a time, and you select the correct answer from four choices.

You have no time limit on individual questions, but the entire test (including the general knowledge section) typically takes 15 to 30 minutes. You can take your time reading each sign and thinking about the answer. If you are unsure about a sign, you can mark it and come back to it if the system allows, or you can make your best guess and move forward.

After you finish the test, you will receive your score when ready. If you pass the sign section (16 out of 20), you move forward with the rest of your renewal. If you fail (fewer than 16 correct), most Missouri license offices will let you retake the test the same day, usually after a short wait. You are not penalized for retaking the test, and there is no limit to how many times you can retake it during a single visit.

What happens if you fail the road sign test

A failed sign test does not stop your license renewal. You can retake the test when ready at the same office, or you can schedule another appointment to come back and try again. There is no waiting period between attempts, and failing the test does not affect your driving record or your ability to drive legally until your current license expires.

If you fail the test on your first attempt, take a moment to review the signs you missed before retaking it. The study guide is usually available at the license office, or you can ask the staff which categories of signs gave you trouble. Most people pass on the second attempt because they now know what to expect and can focus on the specific signs they struggled with.

If you fail multiple times, you may want to spend more time with the Missouri Driver Guide before returning. Some people find it helpful to print out the sign section and study it at home for a few days, or to look up videos online that show the signs and explain what each one means.

Differences between in-person and mail or online renewal

If you renew your Missouri license by mail or through the online portal, you will not take a written test at all, including the road sign test. Mail and online renewals are available if your license is not expired, you have no medical conditions that require testing, and your driving record meets Missouri's standards. In those cases, you straightforward submit your renewal form and fee, and your new license arrives by mail.

You only take the written test — and the road sign portion — if you renew in person at a license office. In-person renewal is required if your license has been expired for more than a certain period, if you have had violations or suspensions, or if you choose to renew in person even though you are not required to.

The road sign test is one of the reasons some people prefer to renew in person rather than by mail, because it gives them a chance to refresh their knowledge of traffic signs. Others see it as an unnecessary hurdle. Either way, it is a straightforward test that most drivers pass on the first attempt if they have spent a few minutes reviewing the study guide.

Tips for preparing for the road sign test

Start by downloading the Missouri Driver Guide from sos.mo.gov and reading through the road sign section. You do not need to memorize every sign — focus on understanding what each sign tells you to do. For example, a yield sign means you must slow down and let other traffic pass; a one-way sign means you can only drive in the direction the arrow points.

Pay attention to the difference between regulatory signs (which are usually red, white, and black, and tell you what you must or must not do) and warning signs (which are usually yellow and diamond-shaped, and alert you to a hazard ahead). This distinction helps you understand the purpose of each sign, which makes it easier to remember.

If you have time before your appointment, take a drive around your neighborhood or a nearby highway and look for the signs you studied. Seeing them in real life reinforces what you learned from the guide. You might also ask a family member or friend to quiz you on the signs by showing you pictures and asking what each one means.

On the day of your appointment, arrive a few minutes early so you are not rushed. Take a deep breath before you start the test. Remember that you only need to get 16 out of 20 correct, so you can afford to miss a few. If you are nervous, tell the staff member administering the test — they are used to this and can often help you feel more comfortable.

Common signs that appear on Missouri's test

The signs most frequently tested include stop, yield, speed limit, one-way, do not enter, pedestrian crossing, school zone, curve ahead, slippery when wet, and no parking. These are the signs you see almost every time you drive, so they are the ones Missouri emphasizes on the test. If you are familiar with what these signs mean and what drivers must do when they see them, you will pass the sign portion.

Warning signs like "curve ahead" or "hill" are tested because they alert drivers to road conditions that require caution. Regulatory signs like "no left turn" or "keep right" are tested because they enforce traffic laws. Informational signs like "hospital" or "rest area" are tested less often but may appear. The study guide shows examples of all of these, organized by type.

One common source of confusion is the difference between similar-looking signs. For example, a yield sign is red and white with a red border, while a stop sign is red with white letters. A one-way sign is rectangular and black and white, while a do-not-enter sign is round and red and white. The test questions make these distinctions clear by showing you the actual sign and asking what it means, so you do not have to guess based on memory alone.

Frequently Asked Questions

Do I have to take the road sign test if I renew my license by mail?

No. Mail and online renewals do not include a written test. You only take the road sign test if you renew in person at a Missouri license office. If you are not required to renew in person and you want to avoid the test, you can renew by mail or online instead.

What if I fail the road sign test — does it affect my license?

No. A failed test does not affect your driving record or your ability to drive. You can retake the test the same day at the same office, or you can come back another day. You can retake it as many times as you need to pass.

Where can I study for the road sign test?

read the Missouri Driver Guide from sos.mo.gov. The guide includes pictures of every sign that could appear on the test, along with explanations of what each sign means. You can also find study materials and practice tests on the Missouri Secretary of State website.

How many signs do I need to get right to pass?

You need to correctly identify at least 16 out of 20 signs, which is an 80 percent pass rate. You can miss up to four signs and still pass the test.

Can I retake the road sign test if I fail it?

Yes. Most Missouri license offices allow you to retake the test the same day, usually after a short wait. If you prefer, you can also schedule another appointment to come back and retake it later. There is no penalty for retaking the test.