After MANY years of towing I was stopped yesterday by the MA DOT. I've a Dodge Ram 2500 with 24 ft enclosed trailer. It was told to me that since I have a combined GVW over 10,000 lbs and traveling from CT to NY through MA I was required to obtain a DOT number and put my name on both sides of the truck. I explained that I'm a hobby racer and have been for years. He said that if I win money racing and travel interstate that constitutes "interstate commerce" and I have to register with the DOT.
Can someone shed some light on this please?