Every so often drivers ask me how to report a company that forces them to work over hours, or drive unsafe equipment. The government has set up a toll free hotline to take these complaints and start an investigation. The DOT website to report violations can be found here and states:
The Motor Carrier Safety hotline is a line of communication available to commercial vehicle drivers to submit reports of actual or potential violations of the federal motor carrier safety regulations. The line, 1-888-DOT-SAFT (368-7238), is a toll-free number for drivers nationwide to contact the Federal Motor Carrier Safety Administration.
The Safety Violation and the Consumer Household Goods Commercial Complaint Website Hotline http://nccdb.fmcsa.dot.gov is available to drivers to report safety violations to the Federal Motor Carrier Safety Administration online using a secure system.