Work Truck Logo
MenuMENU
SearchSEARCH

Top 5 CDL Drug & Alcohol Clearinghouse FAQs

Despite the three-year lead time of the final rule, the CDL Drug and Alcohol Clearinghouse is on track to launch Jan. 6, 2020. The top five questions are answered.

Kathy Close
Kathy CloseCompliance Expert at J.J. Keller
Read Kathy's Posts
November 6, 2019
Top 5 CDL Drug & Alcohol Clearinghouse FAQs

When a driver fails to provide consent to a limited or full query, he or she is unable to perform a safety-sensitive function for the motor carrier.  

Photo: Nextvoyage from Pexels

3 min to read


The CDL Drug and Alcohol Clearinghouse is on track to launch Jan. 6, 2020. 

Ad Loading...

Despite the three-year lead time of the final rule, common questions continue to surface on how it will all play out. The following are the top five questions received by J. J. Keller, subject-matter experts on the clearinghouse: 

Ad Loading...

1. Who Is Subject to the Requirements? 

Motor carriers and CDL drivers who are subject to 49 CFR Part 382 are subject to the clearinghouse rule. Also, medical review officers (MROs) and substance abuse professionals (SAPs) are called upon to submit information on commercial drivers who have violated testing rules under Part 382. 

2. What Data Must Motor Carriers Provide? 

Motor carriers must report the following events (occurring on or after Jan. 6, 2020) to the clearinghouse:

  • Alcohol testing violations, including an alcohol concentration of 0.04 blood alcohol content (BAC) or higher and refusals to test.

  • Certain drug-testing scenarios where the employer makes the refusal to test determination. 

  • Actual knowledge of a driver’s drug or alcohol use through observation, driver admission, previous employers, or a DUI while operating a commercial motor vehicle.

  • Specific milestones in the SAP program, including:

    • A negative drug and/or alcohol return-to-duty test.

    • Successful completion of all follow-up tests.

3. What Do Service Agents Report?

MROs must report the following events (occurring on or after Jan. 6, 2020) to the database:

  • Drug test violations, including verified positive, adulterated, or substituted drug test results.

  • A refusal to test that is the result of a shy bladder (an inadequate quantity of urine) without a valid medical explanation.

Ad Loading...

SAPs must provide information on the following events (occurring on or after Jan. 6, 2020) including:

  • Successful completion of the DOT return-to-duty process (evaluation and treatment).

  • Eligibility for return-to-duty testing.

4. When Are Queries Requested?

Clearinghouse queries must be performed on anyone seeking or currently holding a position to operate a vehicle requiring a CDL (safety-sensitive position).

When a driver is hired or transferring into a safety-sensitive position, the motor carrier or its designated consortium/third-party administrator (C/TAP) must request a pre-employment query of the database. Also, the motor carrier or its designated C/TAP must perform an annual query on current safety-sensitive positions.

The pre-employment query is a full query. A full query discloses detailed information. It alerts motor carriers to drug and alcohol violations and completed steps in the return-to-duty process. 

Ad Loading...

The annual report is a limited query. A limited query checks for the presence of DOT drug and alcohol testing history in the clearinghouse for a CDL driver. If an annual limited query shows that information exists, the motor carrier must perform a full query to learn specifics. 

A motor carrier may have a policy to automatically request a full query for the annual investigation rather than a limited query. When a driver fails to provide consent to a limited or full query, he or she is unable to perform a safety-sensitive function for the motor carrier.  

5. Do All CDL Drivers Need a Clearinghouse Account?

Only drivers who must consent to a full query are required to have a clearinghouse account. A full query is required of drivers who:

  • Are applying for or transferring into a safety-sensitive position under Part 382.

  • Are subject to a full query as the result of the results of a limited annual query.

  • Have employers requiring full queries for annual investigations.

Driver consent for a full query must be performed in the portal via his or her personal clearinghouse account. A limited query consent is performed outside of the portal by the motor carrier. 

Subscribe to Our Newsletter

More Safety

A shot of a Volvo electric vehicle with a man charging it in front of a residence.
SponsoredAugust 1, 2026

Top 50 Executive Fleets

It is that time of year again! Time for the 2026 list of the Top 50 Executive Fleets, presented by Automotive Fleet and Volvo as part of its annual Fleet 500. Download now to see this year's list of companies!

Read More →
Promotional image announcing a partnership between TRUCE and Applause, featuring a driver’s hands on a steering wheel to represent connected fleet technology, driver safety, and mobile device management.
Safetyby News/Media ReleaseJuly 30, 2026

Applause & TRUCE Software Partner to Improve Driver Safety Through AI-Powered Telematics & Employee Performance Management

Applause has integrated TRUCE driving metrics directly into its employee-first performance and safety platform that transforms mobile devices into AI-powered telematics.

Read More →
Work Truck “Trucks, Tips & Tours” promotional graphic featuring a vocational truck approaching a crash-test vehicle, highlighting Detroit Assurance collision mitigation technology with the headline “Collision Mitigation Explained.”
Safetyby Wayne ParhamJuly 21, 2026

How Detroit Assurance with Active Brake Assist Works

Do you want to see what it is like to experience Detroit Assurance’s Active Brake Assist? In this video, Work Truck will put you in the cab to see how it all works and then hear more details from DTNA’s Mike Young.

Read More →
Ad Loading...
Black graphic with large white text reading “Stop Workplace Violence” framed by blue accent lines.
SafetyJuly 21, 2026

Get Left of Loss: A 5-Step Workplace Prevention Framework for Fleet Operators

Violence risks do not stop at the driver’s door. Learn five practical steps fleets can take to spot threats early and protect workers before loss occurs.

Read More →
Promotional graphic for a Utilimarc guide titled How Better Visibility Cut Speeding Violations by 48% featuring a call-to-action to download the guide.
SponsoredJuly 17, 2026

How Better Visibility Cut Speeding Violations by 48%

Fleet leaders don't need more data, they need clearer visibility into what the data is saying. This case study explores how one utility replaced speeding-event counts with a single metric — miles driven in violation — to strengthen safety and significantly reduce speeding violations.

Read More →
Commercial truck driver wearing a red seat belt smiles from the driver’s seat of a blue truck.
Safetyby StaffJuly 15, 2026

13 Safe Driving Tips for Commercial Vehicle Drivers

Make sure you are spending time on the road safely with these important tips.

Read More →
Ad Loading...
Pavement background with double yellow lines and large text that says Recall, July, and Work Truck logo.
Safetyby Wayne ParhamJuly 10, 2026

Recalls You Need to Know About in July 2026

If you have Altec, Ford, General Motors, Harbinger, Hyundai, Mack Trucks, or Volvo Trucks vehicles in your fleet, you should check these important recalls issued by the National Highway Safety Administration.

Read More →
Illustration of a human hand reaching toward a robotic hand over an aerial view of a city at dusk, with interconnected location pins and network lines symbolizing AI, telematics, connected fleet technology, and data-driven transportation.
SafetyJuly 6, 2026

How Telematics Is Transforming Fleet Risk from Insight to Action

What if you could spot risky driving before it leads to a crash? See how telematics is still changing fleet safety today.

Read More →
View from inside a commercial truck cab showing a driver at the wheel with a large marijuana leaf overlaid by a red prohibition symbol, illustrating DOT restrictions on marijuana use for commercial drivers.
Safetyby Kathy CloseJuly 2, 2026

DOT Rules Remain Firmly Lit on Marijuana

DOT says not so fast on marijuana. Even with federal reclassification efforts, commercial drivers in safety-sensitive roles remain subject to marijuana testing and prohibitions.

Read More →
Ad Loading...
LytxOne promotional graphic featuring an in-cab dash camera and icons representing analytics, search, recording, video, reporting, driver performance, fuel, and location. Headline reads, “New Features Available Now.”
Safetyby News/Media ReleaseJuly 1, 2026

Lytx Adds Fleet Management Enhancements to LytxOne Platform

Lytx has added new features to LytxOne to bring safety, operational insight, asset visibility, and compliance into a unified, all-in-one platform.

Read More →