Not every crash triggers a federal DOT test. Under FMCSA rules, the decision depends on the crash outcome and, for certain nonfatal crashes, whether the CMV driver receives a moving-traffic citation within the applicable regulatory window.[1]
| Crash outcome | Citation to CMV driver? | FMCSA test? |
|---|---|---|
| Human fatality | Yes or no | Yes |
| Bodily injury with immediate medical treatment away from the scene | Moving-traffic citation issued within 8 hours | Alcohol test required |
| Bodily injury with immediate medical treatment away from the scene | Moving-traffic citation issued within 32 hours | Controlled-substances test required |
| Disabling damage requiring tow-away | Moving-traffic citation issued within 8 hours | Alcohol test required |
| Disabling damage requiring tow-away | Moving-traffic citation issued within 32 hours | Controlled-substances test required |
There are two different clocks
For nonfatal injury or tow-away crashes, the citation window is 8 hours for alcohol testing and 32 hours for controlled-substances testing. Separately, the employer must make testing attempts within the timeframes in §382.303. If an alcohol test is not administered within 2 hours, the employer must prepare and maintain a record stating why. Attempts to obtain an alcohol test generally stop after 8 hours. Attempts to obtain a controlled-substances test generally stop after 32 hours.[2]
Why employers get this wrong
A common mistake is assuming every accident requires a DOT test. Testing under DOT authority must be tied to the federal trigger. A separate lawful non-DOT policy may address other accidents, but that is a different testing authority.
See Skyside DOT program management or contact Skyside Compliance.