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Free California School Bus (S) Endorsement Practice Test 2025

Perfect for first-time and renewal CDL/CLP applicants, and those adding endorsements.

California operates the second-largest school transportation system in the nation. Districts across the state—from LAUSD to San Diego, Fresno, and Sacramento—are actively hiring school bus drivers. With major routes along I-5, I-10, and US-101, and ongoing expansion of electric bus fleets, opportunities are growing.

Important: You must obtain both the School Bus (S) and Passenger Vehicles (P) endorsements on your CDL. Without both, you cannot legally drive a school bus in California. You’ll also need to pass a medical examination, background check, drug test, and complete ongoing safety training.

California’s electric bus transition: Many districts are adopting electric school buses for environmental sustainability and student comfort. Even with advanced technologies and automated systems, drivers still need a CDL with School Bus (S) endorsement—and most buses still use air brakes, requiring you to remove the “L” restriction.

Top California employers hiring school bus drivers:

  • Los Angeles Unified School District (LAUSD)—2nd largest in U.S.
  • San Diego Unified School District
  • Fresno Unified School District
  • Sacramento City Unified
  • Private contractors: First Student, Durham School Services, Student Transportation of America

What to expect on the official California School Bus test:

  • Questions: 20 multiple-choice
  • Passing score: 80%
  • Topics covered: Student safety, passenger management, loading/unloading procedures, stopping procedures, emergency exits
  • Also required: Passenger (P) endorsement, Air Brakes test (for most buses)

California-specific rule: Drivers must stop for school buses with flashing red lights and extended stop arm. Exception: On divided or multilane highways with a physical barrier, vehicles on the opposite side do not need to stop. Know this rule—it’s tested.

Study the official 2025 CDL manual (California CDL Handbook 2025) for complete requirements.

Why our practice tests work:

  • 20 questions based on the School Buses section of the CDL manual
  • Instant feedback with detailed explanations after each question
  • Unlimited attempts, no time limit—learn at your pace
  • Progress tracking shows correct/incorrect answers in real time
Real exam-style pitfalls you’ll practice:
Common Traps
Distractors
Trick Wording
Double Negatives
Free California School Bus (S) Endorsement Practice Test 2025
CA commercial driver's license
Based on official CA exam questions
Steven Litvintchouk, M.S., Chief Educational Researcher at Driving-Tests.org

Authored and fact-checked by Steven Litvintchouk, M.S.

Chief Educational Researcher, Driving‑Tests.org (ACES member)
Last verified for accuracy on
Methodology & Editorial Policy

5 min to complete
Available in EN and ES

What to expect on the actual CA permit test

20

questions

16

correct answers to pass

80%

passing score

More CA CDL test resources

  1. School Bus Test 1 (you are here)

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