The Federal Motor Carrier Safety Act (FMCSA) requires that any vehicle over 10,000 ppounds GVWR involved in interstate commerce is a “commercial vehicle.”
Some of the provisions of the FMCSA require DOT numbers, signage, a comercial driver’s license (CDL), medical cards, random alcohol and substance testing, etc. depending on vehicle size, wieght and usage.
As a business in Massachusetts with commercial autos, you may want to consult a specialist on compliance:
12 Howard Street, Worcester MA 01609
800-215-2490
The Transportation Advisor, Inc
PO Box 558, Palmer, MA 01069
800-608-8890