Indiana school bus inspections are run by the Indiana State Police, which checks every school bus and special purpose bus in the state at least once a year before it can carry students, inspects buses 12 years and older a second time mid-year, and can pull any bus for an unannounced spot check whenever troopers decide to.1Indiana State Police. School Bus Safety Every inspection result is posted publicly, so parents and administrators can look up any bus by school corporation or bus number and see when it was last inspected and what the outcome was.
How Often Buses Get Inspected
Indiana law requires the State Police to inspect every school bus and special purpose bus once a year, and the rule covers nonpublic schools as well as public districts.2Indiana General Assembly. Indiana Code 20-27-7-1 – Annual Inspection of Buses The inspection must happen before the bus goes into service for the school year. A bus that passes receives a certificate of inspection; without that certificate, the bus cannot legally transport students.
Older buses carry a second obligation. Any school bus manufactured at least 12 years before the year the certificate is being sought must undergo a semi-annual inspection, scheduled no fewer than five months and no more than seven months after the annual check.3Indiana State Police. 2025 Indiana State Police School Bus Inspection Manual The mid-year inspection is there to catch wear that develops on aging equipment between annual reviews.
On top of the scheduled checks, the Indiana State Police Commercial Vehicle Enforcement Division runs spot inspections throughout the year, with no prior notice.4Indiana State Police. School Bus Inspection and Crashes A bus added to a fleet mid-year must also pass a full inspection before carrying its first student. Between the annual review, the semi-annual check for older buses, and the random spot inspections, there is no quiet stretch when maintenance can be allowed to slide.
What Inspectors Check
State Police inspectors work from a detailed manual that covers the safety-related systems common to school buses and multifunction school activity buses, regardless of the manufacturer.1Indiana State Police. School Bus Safety The inspection reaches nearly every mechanical and safety component on the vehicle.
Brakes, Steering, and Tires
Braking systems get some of the closest attention. Inspectors check air lines, drum conditions, and pad or lining thickness so the bus can stop reliably under load. Steering components are tested for excessive play or worn linkages that could compromise control at highway speed or in an emergency maneuver.
Tires have specific, tiered thresholds. Front tires must have at least 4/32 of an inch of tread depth, and rear tires must have at least 2/32 of an inch. If a front tire falls below 2/32 or a rear tire drops below 1/32, the bus is placed out of service on the spot rather than simply written up for repair.3Indiana State Police. 2025 Indiana State Police School Bus Inspection Manual A tire slightly below the repair threshold gets a work order; a tire far below it takes the bus off the road immediately.
Emergency Exits and Lighting
Every emergency door, window, and roof hatch must open easily and trigger the correct warning buzzer. Inspectors confirm the stop arm extends properly and that all flashing red lights work, since those are the primary protections during loading and unloading. External lighting is checked end to end: turn signals, brake lights, clearance lights, and any roof-mounted strobe lights must function and be visible from the required distances.
Interior
Inside the bus, inspectors confirm seat frames are securely bolted to the floor. Torn seat covers that expose sharp edges or flammable foam are flagged. Loose items and debris are noted because unsecured objects become projectiles in a sudden stop or collision.
Pass, Repair Order, or Out of Service
Every inspection ends with the bus in one of three categories. A bus that meets all standards receives its certificate of inspection and operates normally. That is the only outcome that requires no follow-up.
If an inspector finds defects that fall below standards but do not pose immediate danger, the bus receives a repair order. The inspection manual draws a clear line between conditions that need repair and conditions serious enough to pull the bus from service. Tires illustrate the split: a front tire with less than 4/32-inch tread triggers a repair order, while one below 2/32 triggers an out-of-service determination.3Indiana State Police. 2025 Indiana State Police School Bus Inspection Manual
The most serious outcome is an out-of-service order. When a defect could jeopardize passenger safety, the inspector has a duty to place the bus out of service. An out-of-service certificate is affixed to the bus, which cannot carry passengers until every defect is corrected and the State Police verify the fix through a follow-up inspection. Only the State Police can remove the certificate.3Indiana State Police. 2025 Indiana State Police School Bus Inspection Manual
A school corporation that disagrees with an out-of-service order can appeal to the State School Bus Committee within five days. The committee must review and issue a decision within ten days, and it can uphold, modify, or set aside the order. The bus stays out of service for the entire appeal.3Indiana State Police. 2025 Indiana State Police School Bus Inspection Manual
Looking Up a Specific Bus
The Indiana State Police publish school bus inspection records online, so the safety status and inspection history of any bus in the state are available to the public.1Indiana State Police. School Bus Safety You can search by school corporation name or bus number through the State Police bus inspection portal.5IN.gov. Search Bus Inspections
Each record shows when the bus was inspected, what the outcome was, and whether any defects were identified. For a parent, checking the database before the school year starts is a simple way to confirm your child’s bus has a current, valid inspection. If a bus has not been inspected recently or shows an unresolved deficiency, raising it with your school’s transportation department puts them on notice that someone is watching.
The 12-Year Threshold and What Age Means
The semi-annual requirement for buses 12 years and older is one of the more consequential rules in Indiana’s system. An aging bus might pass its summer inspection cleanly and develop serious brake or suspension problems by January. The mid-year check is designed to catch that kind of deterioration before it becomes a crash.
Indiana does not impose a hard age limit that forces buses into retirement. A 15- or even 18-year-old bus can keep running as long as it passes every required inspection. The economics shift over time, though: older buses fail more often, need more expensive repairs, and face the extra semi-annual evaluation. Many school corporations find that the cost of keeping a bus past a certain age exceeds the cost of replacing it, even without a statute requiring retirement.
Bus age by itself is not a reliable safety signal. A bus with a long record of clean annual and semi-annual inspections is meeting the same standards as a new one, and that is what the inspection database lets you confirm.
A Note on Drivers
Inspections cover the bus, not the person driving it. Indiana sets separate qualifications for school bus drivers under IC 20-27-8-1, including a minimum age of 21, a commercial driver’s license with the school bus (“S”) endorsement, and physical standards more demanding than a standard CDL medical exam.6Indiana General Assembly. Indiana Code 20-27-8-1 – School Bus Drivers and Monitors A current inspection certificate on a bus tells you nothing about the driver’s qualifications, and vice versa. Both have to be in order for the trip to be legal.