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Leading the industry since 1989

888-201-0242

24/7 Emergency Line 903-247-9546

Department of Transportation (DOT) drug testing is federally-mandated and regulated drug testing of workers in safety-sensitive areas of public and private transportation. Congress passed the Omnibus Transportation Employees Testing Act of 1991 that was designed the insure the safety of the traveling public and of transportation employees. The DOT Compliance Department at MRO Longview TX helps companies and organizations determine whether or not they are required to conduct drug testing of their employees in these safety-sensitive areas:

  • Motor carriers (DOT agency – Federal Motor Carrier Safety Administration)
  • Air carriers or operators and some contract air traffic controllers (DOT agency – Federal Aviation Administration)
  • Rail (DOT agency – Federal Railroad Administration)
  • Public transportation (DOT agency – Federal Transit Administration)
  • Pipeline facilities operators and contractors (DOT agency – Pipeline and Hazardous Materials Safety Administration)
  • Maritime (DOT agency – US Coast Guard)


Within these agencies, employees will be subject to pre-employment testing, random testing, reasonable suspicion/reasonable cause testing, post-accident testing, return-to-duty and follow-up testing.

  •  All employees who are new to or transferring to a safety-sensitive position must be drug-tested. Alcohol testing may be done as needed.
  •  All employees are eligible for random drug and alcohol testing.
  •  Employees who are suspected of being under the influence of drugs or alcohol can be tested. Testing cannot be based on a hunch or a guess. It must be based on specific observations of appearance, behavior, appearance or smell.
  •  Employees who are involved in accidents may be tested for drug and alcohol use.  Depending on the type of accident, the supervisor at the scene will determine whether or not to test the employee.
  •  Employees who test positive, refuse a test or violate other DOT agency provisions and regulations must be tested before they can return to work in a safety-sensitive area. The same employees will also be subject to a follow-up testing plan (developed by a substance abuse professional) that consists of at least 6 follow-up tests in the first 12 months of a worker’s return to duty.


Not only do the trained professionals at MRO Longview TX conduct pre-employment, random testing and reasonable suspicion/reasonable cause testing, we are also able to quickly coordinate post-accident testing using a database of collection sites and a staff of highly-trained on-call collectors.  Our collectors are available 24 hours a day, 7 days a week.  In addition, we offer Post-Accident Kits for motor carriers who are involved in accidents outside the area served by our collectors.


MRO Longview TX is the leader in providing DOT Compliance testing to Texas and Louisiana (now including the cities of Texarkana, Texas and Texarkana, Arkansas).  We are committed to customer service and dependability.  Call us at 888-201-0242 today.