The Federal Motor Carrier Safety Administration on Friday, June 8, announced that it ordered Racine, Wis.-based truck company WTSA US Express to cease all transportation services immediately following an extensive review of the company’s operations that discovered multiple federal safety violations in the areas of drivers’ hours-of-service compliance, driver qualifications and drug testing requirements.

FMCSA said its investigators found that the company employed drivers without valid commercial driver’s licenses and medical certificates, and that it allowed its drivers to operate without records of duty status. Additionally, WTSA US Express did not test its drivers for controlled substances.

“Our aggressive safety enforcement efforts, designed to shut down the bad actors, are effectively raising the bar for truck and bus safety,” said FMCSA Administrator Anne Ferro. “We will continue to do everything possible to protect the traveling public and help save lives.”