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Missouri School Bus Test

Missouri's school bus drivers face everything from heavy St. Louis traffic to icy US-60 hills.

86
Questions
80%
To Pass
25
Minutes

86 questions · 25 min time limit · 80% to pass

Opens in a practice window — choose your mode inside.

JM

Reviewed by Jack Mahana, CDL Instructor (13+ years)

Last verified: August 2026

All questions sourced from the official Missouri CDL handbook and FMCSA regulations.

About the Missouri School Bus Test

Driving a school bus in Missouri means you're responsible for the state's most precious cargo. You'll navigate busy St. Louis interchanges, narrow rural roads in the Ozarks, and unpredictable weather from ice storms to summer downpours. Missouri's agricultural communities mean you might share roads with farm equipment. Every year, school buses in Missouri log millions of miles.

The School Bus endorsement (S endorsement) requires a separate knowledge test on top of your CDL general knowledge. The Missouri DMV asks 20 questions, and you can only miss 4. This practice test mirrors the real exam. It covers student loading and unloading, emergency evacuations, railroad crossings, and pre-trip inspections specific to school buses.

Missouri law also requires you to understand the state's stop-arm laws and flashing light procedures. You'll need to know how to handle students with special needs and what to do during an evacuation on a highway like I-70. Our questions pull from the latest Missouri CDL handbook.

Use this test to find your weak spots. Take it multiple times. Each attempt shuffles the questions. When you're ready, schedule your Missouri DMV appointment.

Topics Covered

✓Student loading and unloading – Missouri's rural routes mean many stops on narrow shoulders and blind curves.
✓Railroad crossing procedures – Missouri has thousands of grade crossings; you must stop and open the door.
✓Emergency evacuation drills – Know how to empty a bus fast on I-44 or a flooded county road.
✓Stop-arm laws – Passing a stopped school bus in Missouri carries heavy fines and license suspension.
✓Pre-trip inspection – Missouri winters demand extra checks on heaters, defrosters, and tire chains.
✓Special needs students – Missouri schools require drivers to handle wheelchairs and medical emergencies.

Study Tips

Read the Missouri Commercial Driver License Manual, especially the School Bus section. Don't skip the diagrams of proper mirror usage – Missouri's hilly terrain makes blind spots bigger. Focus on the eight-step pre-trip inspection. Many Missouri testers ask you to demonstrate it.

Study the flashing light sequences: yellow, then red. Missouri law says you must activate amber lights 100 to 500 feet before a stop. Practice the exact wording for railroad crossing procedures – you must say "stop, open door, look, listen." Our practice test uses the same language.

Take this test at least three times. Aim for 100% before you schedule your DMV visit. Use the review mode to read explanations. One wrong answer can cost you the test, so be thorough.

Missouri Specific Information

The Missouri DMV tests school bus knowledge at all Class A and Class B CDL testing locations. You'll need an appointment – walk-ins aren't guaranteed. Schedule online or call your local license office. Fees: $10 for the written test, plus $16 for the School Bus endorsement on your license.

You must pass the general knowledge test first. Then you can take the School Bus test. Bring your Missouri CDL handbook, proof of identity, and medical examiner's certificate. No electronic devices allowed in the testing room.

If you fail, you can retake the test the next business day. There's no limit on attempts, but each retry costs $10. Our practice test simulates the real timer – 25 minutes for 20 questions. That's plenty of time, but don't rush.

Frequently Asked Questions

Do I need a separate CDL test to drive a school bus in Missouri?
Yes. You need a valid CDL with a School Bus (S) endorsement. That means passing the general knowledge test and the School Bus knowledge test.
How many questions is the Missouri School Bus endorsement test?
It's 20 questions. You need at least 16 correct (80%) to pass. Our practice test uses the same format.
Can I take the School Bus test online?
No. Missouri requires you to take it in person at a license office or a third-party testing site. You must schedule an appointment.
What happens if I don't stop for a school bus in Missouri?
You'll get a fine and points on your license. If you're a CDL holder, it can lead to disqualification. Know the law.
Is the School Bus pre-trip inspection part of the Missouri CDL skills test?
Yes. If you're getting an S endorsement, the skills test includes a specific school bus pre-trip inspection. Our practice test covers the knowledge part only.
JM

Reviewed by Jack Mahana, CDL Instructor (13+ years)

Last verified: August 2026 · FMCSA-compliant content