The four companies were using the same trucks, drivers and managers yet operating under four different names.
Atlanta-based carrier Southern Transportation Inc. has been ordered by the Federal Motor Carrier Safety Administration to shut down its operations.
The Federal Motor Carrier Safety Administration has ordered Oak Park, Mich.-based Highway Star Inc., one of its drivers, and Atlanta-based General Trucking Inc. to immediately cease operations.
The U.S. Department of Transportation's Federal Motor Carrier Safety Administration has been on a cleaning sweep since late November.
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