Is DOT Hair Testing About to Become Law?
DOT hair testing rules could be changing in 2025 — and most drivers still don’t know it’s coming.
Congress is reviewing a bill that would make hair drug tests count the same as urinalysis, meaning failed tests could end up in the FMCSA Clearinghouse. The proposed law is known as H.R. 4320, and it could shake up how DOT drug testing works for CDL drivers nationwide.
While some mega-carriers already use hair testing in-house, those results aren’t currently DOT-compliant — so they can’t be reported to the Clearinghouse. But if this rule passes, your past failed hair test could follow you, even months later.
🧪 What Would the New DOT Hair Testing Rule Actually Do?
- Allow failed hair tests to be reported to the FMCSA Clearinghouse
- Make private carrier hair test results part of your federal drug and alcohol record
- Force drivers to complete a return-to-duty process for failed hair tests
- Possibly apply retroactively if carriers submit past results
That means a test from a job you didn’t take seriously — or even forgot about — could now come back and shut down your future income.
🎯 Why This Matters to CDL Drivers
This bill isn’t just about testing methods — it’s about how test results are tracked, reported, and enforced. If H.R. 4320 passes, it will raise the stakes for both current drivers and anyone trying to re-enter the industry.
Hair testing can detect drug use going back as far as 90 days or more, depending on hair length. That’s a much wider window than urinalysis — and it could flag drivers long after the fact.
🎥 Join Us for a Live Q&A
We’re sitting down with a DOT-certified collection specialist and a freight industry veteran who knows how the system really works — and what drivers need to do to protect their careers.
- 📅 Date: Saturday, July 20th
- ⏰ Time: 1:00 PM EST
- 📍 Where: Freight Pro Hub YouTube Channel
We’ll break down:
- How DOT hair testing actually works
- What the new rule could mean if H.R. 4320 passes
- What drivers already in the Clearinghouse should know
- How to protect your income and your CDL in 2025
This isn’t fear — it’s preparation. Join us live and get the truth.
