Background Federal Motor Carrier Safety Administration is part of US Dept of Transportation
It is illegal to drive drugged in every state, but proving that the driver was impaired is a problem with prosecutions.
Background C-TPAT = Customs-Trade Partnership Against Terrorism FAST = Free and Secure Trade
Background USPS and FedEx allow some deaf drivers to operate delivery vehicles under 10K lbs Disability Rights Advocates represented current and former employees who were passed over for driving positions