In this piece, we are going to be looking at trucking companies that do hair drug testing. An Austin truck accident lawyer shares: “Hair drug testing is a proactive approach by trucking companies to ensure safety on the highways. Trucking accidents in particular can have especially catastrophic consequences, so it’s only logical to ensure that those behind the wheel are in the best possible state, mentally and physically.”Trucking Companies That Do Hair Drug TestingThe following are trucking companies that do hair drug testing:What Is Hair Drug Testing? The essence of hair drug testing is to establish the presence of either the drug itself or any of its byproducts. Why Hair Drug Testing Is ImportantThis testing is not a federal obligation in the United States.