DOT Tractor-Trailer Drug and Alcohol Testing Policy

USPS employees who operate tractor-trailers and 7-ton and 9-ton trucks, as well as mechanics who repair them, fall under the jurisdiction of the Department of Transportation(DOT) regarding drug and alcohol testing, in accordance with regulations enacted in 1995.

Management Instruction, PO-720-2 [PDF], issued on Sept. 29, 1995, outlines USPS procedures for alcohol and drug testing. Minor changes have been made since then, and many clarifications have been made.