Drug and alcohol testing guides

Guides

• DOT vs. non-DOT drug testing

  Who the federal rules cover, what they require, and what changes when an employer’s own policy applies instead.

• Post-accident testing basics

  What triggers a post-accident test, the FMCSA time windows, and what to do in the first hour.

• Alcohol testing options

  Breath and EtG testing compared: what each one measures and which situations call for it.

• DOT testing in 2026

  The 2026 random testing rates by DOT agency, and the rules employers ask about most.

These guides are general education, not legal advice. DOT agency rules and 49 CFR Part 40 control DOT testing. Confirm the rules for your program with your DOT agency, program administrator or counsel.