RTD process: How much time is required to resume driving after a failed drug test? If a truck driver is tested positive or refused the drug and alcohol test, a complete RTD process is observed to get back the driver to the safety-sensitive work. RTD stands for? RTD stands for Return-to-Duty process which includes a complete procedure to get back to the road after a violation of drug. When should a driver start Return-to-duty process? 1. After violation of drug and alcohol rules 2. Refusing the test (for whatever reason behind) 3. Positive alcohol and drug test