Most articles about drug testing are written for the driver: what's tested, what happens if you fail. This one is for the company. If you employ school bus drivers who need a CDL, you run a federal drug and alcohol testing program — the policy, the pre-employment test, the random pool, the Clearinghouse queries and the records — and an auditor will ask you, not the driver, to show it. Here is school bus driver drug and alcohol testing for contractors, step by step.
Are school bus drivers covered by DOT drug and alcohol testing?
Yes, when they need a CDL. FMCSA's rules (49 CFR Part 382, with the testing procedures in Part 40) cover every driver who operates a commercial motor vehicle and needs a CDL or a commercial learner's permit — full-time, part-time, substitute and occasional drivers alike — and their employers. FMCSA's Drug & Alcohol Clearinghouse lists school bus drivers and school districts among those covered.
This surprises people who know that home-to-school transportation is exempt from most of the federal motor carrier rules. That exemption doesn't take your CDL drivers out of drug and alcohol testing. Drivers covered only by the Federal Transit Administration's testing rules (Part 655) are the main exception.
Tip: A van driver who doesn't need a CDL isn't in the DOT program — but your state, your district contract or your insurer may still require testing. In New Jersey, for example, every vehicle registered as a school bus needs a CDL driver, so check your state before you assume.
The employer's checklist
| What | When | Rule |
|---|---|---|
| A written drug and alcohol policy and educational materials for every driver | Before they drive | 49 CFR 382.601 |
| Supervisor training — at least 60 minutes on alcohol and 60 on drugs, for anyone who might order a reasonable suspicion test | Once | 382.603 |
| Register in the Clearinghouse and buy a query plan | Before your first hire | 382.701 |
| Pre-employment drug test with a verified negative result | Before the first safety-sensitive work | 382.301 |
| Pre-employment full query in the Clearinghouse | Before the first safety-sensitive work | 382.701(a) |
| Random drug and alcohol tests | All year, unannounced | 382.305 |
| Annual query for every CDL driver | At least once every 12 months | 382.701(b) |
| Post-accident tests | After a qualifying accident | 382.303 |
| Reasonable suspicion tests | When a trained supervisor sees the signs | 382.307 |
| Return-to-duty and follow-up tests | After a violation, through a SAP | 382.309, 382.311 |
| Records, kept confidential and secure | 1 to 5 years, by type | 382.401 |
The pre-employment test and Clearinghouse query
Before a new driver does any safety-sensitive work — driving, but also inspecting or waiting to drive a bus — you need two things:
- A pre-employment drug test with a verified negative result from the Medical Review Officer (MRO). There's a narrow exception for a driver who was in a compliant testing program in the last 30 days and was tested in the last six months or in a random pool for the last 12 months — and you must document it. A pre-employment alcohol test is optional; if you do one, do it for everyone, after a conditional offer.
- A full query in the Clearinghouse. The driver gives specific electronic consent inside the Clearinghouse first. If it shows a violation without a completed return-to-duty process, the driver can't drive for you.
Queries cost a flat $1.25 each, bought through a query plan; registering is free. Only the employer can buy the plan, even if a third-party administrator runs the queries.
How the random pool works
For 2026, FMCSA's minimum random rates are unchanged: 50% for drugs and 10% for alcohol, of your average number of driver positions in the year. A company averaging 40 CDL drivers needs at least 20 random drug tests and 4 random alcohol tests in the year — and some drivers may be picked twice while others aren't picked at all. That's how random works.
- A scientifically valid method — a random number table or a computer program, matched to an ID such as an employee number. Picking names from a list by hand isn't one.
- An equal chance for every driver in the pool at every selection, and only covered (CDL) drivers in the pool.
- Unannounced, with dates spread reasonably through the year — not all in September.
- A selected driver goes for the test right away. Alcohol tests happen just before, during or just after driving.
- Joining a consortium run by a consortium/third-party administrator (C/TPA) is allowed and common for small fleets: your drivers go into a larger pool and the C/TPA does the selecting. You stay responsible for the program. An owner-operator who is their own only driver must be in a pool with at least one other driver.
Tip: School calendars matter: spread selections across the school year, and plan for summer, when many drivers aren't working. Your C/TPA can explain how they handle drivers who are off when picked.
Post-accident and reasonable suspicion tests
After an accident on a public road, test the surviving driver when:
- Someone died — always, citation or not.
- The driver gets a moving-violation citation and someone was injured and treated away from the scene.
- The driver gets a citation and a vehicle was towed away with disabling damage.
The alcohol test should be done within 2 hours (stop trying after 8) and the drug test within 32 hours, with a written reason if either is missed. A reasonable suspicion test needs a supervisor who has had the training to see — and write down — specific signs in the driver's appearance, behavior, speech or body odor. Our after a school bus accident post covers the rest of the accident checklist.
What to report to the Clearinghouse
The MRO reports verified positive, adulterated and substituted drug results. You report, by the close of the third business day after you learn of it:
- Alcohol results of 0.04 or higher.
- Refusals to test.
- Actual knowledge of a driver's use (for example, you saw it).
- A driver's negative return-to-duty test and the completion of follow-up testing.
Since Nov 18, 2024, state driver licensing agencies check the Clearinghouse too, and start removing the CDL privileges of a driver in prohibited status until they finish the return-to-duty process. A driver with an unresolved violation may simply lose the license.
How long to keep drug and alcohol testing records
| Keep for | What |
|---|---|
| 5 years | Alcohol results of 0.02 or more, verified positive drug results, refusals, SAP evaluations and referrals, calibration records, records of the program's administration and each annual summary. |
| 2 years | Records of the collection process. |
| 1 year | Negative and cancelled drug results, and alcohol results under 0.02. |
| While they work for you + 2 years | Training records for supervisors and drivers. |
Keep them in a secure location with controlled access — separate from the general driver file. Our driver qualification file checklist covers what goes in that file.
Doing it in FleetCommander
FleetCommander doesn't select drivers for random tests and isn't connected to the Clearinghouse — use a C/TPA or your own program for the random pool, the collections and the queries. What it does is keep the dates and papers around them with the rest of each driver's file:
- Each driver's record has a Drug/alcohol test status box, and the driver's Documents tab takes Drug Testing Documentation with an expiry date if you want a reminder. Documents are only open to signed-in people whose role allows it — decide who that should be.
- The Training & screening status report under Reports › Drivers lists every driver's training, background check and drug/alcohol test status together.
- With the HR section on, Certifications has a ready-made Drug test type (once a year to start, for drivers — change it). Under Certification types, Add certification type for anything else you want reminded about, such as an annual Clearinghouse query or supervisor training, with Renew every (months) set to 12.
- Incidents records each accident's date and time, the driver, injuries, property damage and the police report number — the facts you need to decide whether a post-accident test is required.
Ask Ava (Beta) in the app Maria Chen drug test status, or — with HR access — Which certifications expire this month? See the HR guide and the Drivers guide.
Good to know: This summarizes 49 CFR Part 382 and FMCSA's Clearinghouse guidance as of Oct 25, 2026, including the 2026 random rates (50% drugs, 10% alcohol). It isn't legal advice. Your C/TPA, MRO and FMCSA's Clearinghouse site have the details; states, districts and insurers can add their own testing rules.
Questions people ask
- Do school bus drivers have to be in a random drug testing pool?
- Yes, if they need a CDL. FMCSA's Part 382 covers CDL drivers of school buses, and employers must run random drug and alcohol tests — in 2026 at least 50% (drugs) and 10% (alcohol) of their average driver positions a year.
- Does a school bus contractor have to query the Clearinghouse?
- Yes. A full query before a new CDL driver does safety-sensitive work, and a query at least once a year for every current CDL driver. Queries cost $1.25 each; registering is free.
- Can a small school bus company join a consortium for random testing?
- Yes. A consortium/third-party administrator can combine your drivers into a larger pool and make the selections, but you remain responsible for the program and its records.
- How long do you keep a driver's drug test records?
- Positive results, refusals and other violation records for 5 years, collection records for 2 years, and negative results for 1 year, in a secure place with controlled access.