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['Drug and Alcohol Testing - DOT']
['Return-to-duty drug and alcohol testing - Motor Carrier', 'Safety-sensitive function - Motor Carrier', 'Drug and alcohol policy - Motor Carrier', 'Alcohol testing - Motor Carrier', 'Follow-up alcohol and drug testing - Motor Carrier', 'Drug testing - Motor Carrier', 'Designated employer representative (DER) - Motor Carrier', 'Substance abuse professional (SAP) - Motor Carrier']
07/31/2025
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InstituteDrug and alcohol policy - Motor CarrierDrug testing - Motor CarrierDrug and Alcohol Testing - DOTTransportationReturn-to-duty drug and alcohol testing - Motor CarrierEnglishFleet SafetyFocus AreaDesignated employer representative (DER) - Motor CarrierSubstance abuse professional (SAP) - Motor CarrierSafety-sensitive function - Motor CarrierAlcohol testing - Motor CarrierAnalysisIn Depth Sub Topics (Level 4)Follow-up alcohol and drug testing - Motor CarrierUSA
Negative return-to-duty test
['Drug and Alcohol Testing - DOT']

- After the DER receives the SAP report and the SAP notes completed steps in the Clearinghouse, drivers are eligible to pass a return-to-duty test.
- A negative test allows the driver to return to performing a safety-sensitive function.
A negative return-to-duty test allows a driver to return to performing a safety-sensitive function after engaging in prohibited behavior under a Department of Transportation (DOT)-drug and alcohol rules. However, as noted earlier, this test cannot be performed until the designated employer representative (DER) receives the of substance abuse professional (SAP) report and the SAP enters the completed steps on the driver’s record in the CDL Drug and Alcohol Clearinghouse.
The return-to-duty alcohol and drug test requirements are summarized below:
- Alcohol test. After engaging in prohibited conduct regarding alcohol misuse, the driver must undergo a return-to-duty alcohol test before performing a safety-sensitive function. The test result must indicate a breath alcohol concentration of less than 0.02.
- Drug test. After engaging in prohibited conduct regarding drug use, the driver must undergo a return-to-duty drug test under direct observation before performing a safety-sensitive function. The test result must indicate a verified negative result for drug use.
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drug-and-alcohol-testing-dot
FOUNDATIONAL LEARNING
InstituteDrug and alcohol policy - Motor CarrierAlcohol testing - Motor CarrierFleet SafetyDrug and Alcohol Testing - DOTDrug testing - Motor CarrierTransportationSafety-sensitive function - Motor CarrierEnglishAnalysisFocus AreaCompliance and Exceptions (Level 2)USA
What regulations apply to DOT drug and alcohol testing?
InstituteDrug and alcohol policy - Motor CarrierMedical review officer (MRO) - Motor CarrierDrug testing - Motor CarrierDrug and Alcohol Testing - DOTTransportationIn Depth (Level 3)EnglishFleet SafetyBreath alcohol technician - Motor CarrierConsortium: third-party administrator (TPA) - Motor CarrierDesignated employer representative (DER) - Motor CarrierSubstance abuse professional (SAP) - Motor CarrierAlcohol testing - Motor CarrierAnalysisFocus AreaUSA
Key definitions
InstituteDrug and alcohol policy - Motor CarrierAlcohol testing - Motor CarrierFleet SafetyDrug and Alcohol Testing - DOTDrug testing - Motor CarrierTransportationIn Depth (Level 3)Consortium: third-party administrator (TPA) - Motor CarrierDesignated employer representative (DER) - Motor CarrierSafety-sensitive function - Motor CarrierEnglishAnalysisFocus AreaUSA
What is the designated employer representative’s (DER’s) role?
InstituteDrug and alcohol policy - Motor CarrierAlcohol testing - Motor CarrierMedical review officer (MRO) - Motor CarrierFleet SafetyDrug and Alcohol Testing - DOTDrug testing - Motor CarrierTransportationFocus AreaDesignated employer representative (DER) - Motor CarrierConsortium: third-party administrator (TPA) - Motor CarrierEnglishAnalysisIn Depth Sub Topics (Level 4)USA
DER as contact person
InstituteDrug and alcohol policy - Motor CarrierEnglishMedical review officer (MRO) - Motor CarrierFleet SafetyDrug and Alcohol Testing - DOTDrug testing - Motor CarrierConsortium: third-party administrator (TPA) - Motor CarrierFocus AreaUSAAlcohol testing - Motor CarrierAnalysisTransportationIn Depth (Level 3)
What service providers will a motor carrier need to manage its testing program?
InstituteDrug and alcohol policy - Motor CarrierMedical review officer (MRO) - Motor CarrierDrug testing - Motor CarrierDrug and Alcohol Testing - DOTTransportationEnglishFleet SafetyBreath alcohol technician - Motor CarrierFocus AreaConsortium: third-party administrator (TPA) - Motor CarrierSubstance abuse professional (SAP) - Motor CarrierAlcohol testing - Motor CarrierAnalysisIn Depth Sub Topics (Level 4)USA
Auditing service providers
InstituteDrug and alcohol policy - Motor CarrierEnglishFleet SafetyIn Depth Sub Topics (Level 4)Drug and Alcohol Testing - DOTDrug testing - Motor CarrierFocus AreaConsortium: third-party administrator (TPA) - Motor CarrierAlcohol testing - Motor CarrierAnalysisTransportationUSA
Consortium/Third-party administrators
InstituteNon-evidential alcohol screening devices - Motor CarrierDrug and alcohol policy - Motor CarrierEvidential breath testing device (EBT) - Motor CarrierFleet SafetyEnglishIn Depth Sub Topics (Level 4)Drug and Alcohol Testing - DOTDrug testing - Motor CarrierBreath alcohol technician - Motor CarrierFocus AreaAlcohol testing - Motor CarrierAnalysisTransportationUSA
On-site audits of collection sites
InstituteDrug and alcohol policy - Motor CarrierEnglishMedical review officer (MRO) - Motor CarrierFleet SafetyIn Depth Sub Topics (Level 4)Drug and Alcohol Testing - DOTDrug testing - Motor CarrierFocus AreaDesignated employer representative (DER) - Motor CarrierAlcohol testing - Motor CarrierAnalysisTransportationUSA
Providing collectors with necessary information
Negative return-to-duty test
InstituteDrug and alcohol policy - Motor CarrierDrug testing - Motor CarrierDrug and Alcohol Testing - DOTTransportationReturn-to-duty drug and alcohol testing - Motor CarrierEnglishFleet SafetyFocus AreaDesignated employer representative (DER) - Motor CarrierSubstance abuse professional (SAP) - Motor CarrierSafety-sensitive function - Motor CarrierAlcohol testing - Motor CarrierAnalysisIn Depth Sub Topics (Level 4)Follow-up alcohol and drug testing - Motor CarrierUSA
['Drug and Alcohol Testing - DOT']

- After the DER receives the SAP report and the SAP notes completed steps in the Clearinghouse, drivers are eligible to pass a return-to-duty test.
- A negative test allows the driver to return to performing a safety-sensitive function.
A negative return-to-duty test allows a driver to return to performing a safety-sensitive function after engaging in prohibited behavior under a Department of Transportation (DOT)-drug and alcohol rules. However, as noted earlier, this test cannot be performed until the designated employer representative (DER) receives the of substance abuse professional (SAP) report and the SAP enters the completed steps on the driver’s record in the CDL Drug and Alcohol Clearinghouse.
The return-to-duty alcohol and drug test requirements are summarized below:
- Alcohol test. After engaging in prohibited conduct regarding alcohol misuse, the driver must undergo a return-to-duty alcohol test before performing a safety-sensitive function. The test result must indicate a breath alcohol concentration of less than 0.02.
- Drug test. After engaging in prohibited conduct regarding drug use, the driver must undergo a return-to-duty drug test under direct observation before performing a safety-sensitive function. The test result must indicate a verified negative result for drug use.
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