Endorsements and Disqualifications
This domain tests what the school bus endorsement authorizes, what restrictions may appear on a CDL, and the offenses that can suspend or permanently revoke commercial driving privileges.
School bus endorsement and restrictions
The school bus endorsement authorizes driving a school bus with students aboard after all other requirements are met. The knowledge test covers loading and unloading, railroad crossings, student management, emergency exits, and inspections. The skills test includes a school bus pre-trip and driving tasks. Restrictions may include corrective lenses, automatic transmission only, or no air brakes. A restriction stays on the CDL until the driver tests without it.
Major disqualifications
A first conviction for driving under the influence of alcohol or drugs, refusal to submit to testing, leaving the scene of an accident, using a CMV in a felony, driving with a suspended CDL, causing a fatality through negligent operation, or a railroad crossing violation generally disqualifies a driver for at least one year. A second major offense can mean lifetime disqualification. The commercial alcohol limit is 0.04, lower than the 0.08 limit for a personal vehicle, and a personal-vehicle DUI can also disqualify a CDL holder.
Serious traffic violations and school bus specifics
Two serious traffic violations in three years bring a 15-day disqualification; three bring 30 days. Serious violations include excessive speeding, reckless driving, improper lane changes, and following too closely. Texting or handheld phone use in a CMV brings a 60-day disqualification for a first conviction, 120 days for a second, and a year for a third. State law and employer policy add school bus-specific consequences for child endangerment, failing background checks, or certain traffic convictions.
Worked example
A school bus driver receives a handheld phone ticket while operating a CMV. The first conviction brings a 60-day CDL disqualification. The reasoning is that the handheld rule applies to CMVs, and the penalty escalates with repeat convictions.
Traps
Believing a personal-vehicle DUI does not affect the CDL, confusing the 0.04 CMV limit with 0.08, ignoring serious violations because they are not major offenses, and assuming an endorsement removes a restriction.