Massachusetts-Specific Rules and Regulations
This domain tests the Massachusetts rules layered on top of the federal CDL standards: who needs the endorsement, how the RMV tests it, and the state laws that show up in the on-road drive.
Core rules
- The passenger (P) endorsement is required for a CMV designed to carry 16 or more people including the driver. A school bus requires the separate S endorsement.
- The RMV administers the passenger endorsement knowledge test and the skills test; the state CDL manual is the study source.
- Hands-free law: no handheld use of a phone or device while driving, including while stopped at a light.
- Move Over law: slow down and move over for emergency, tow, and highway maintenance vehicles with lights flashing.
- Seat belts must be worn; the driver is responsible for ensuring riders follow the law.
- Default speed limits unless posted: 30 mph in thickly settled or business districts, 20 mph in school zones, 40 mph on other roads, 55 mph on divided highways, and 65 mph on the Turnpike and other limited-access highways where posted.
- Right turn on red is permitted after a full stop unless a sign prohibits it. Yield to traffic in rotaries.
- OUI: 0.08% for most drivers, but 0.04% for a CDL holder operating a CMV. Implied consent applies.
- Hazardous materials are restricted in Boston's tunnels, and Massachusetts limits unnecessary idling.
Worked example
A bus is disabled on the shoulder with flashers on and a tow truck working. Approaching drivers must slow down and, if safe, change lanes away from the scene, not just edge past in the same lane.
Traps that cost marks
Applying a neighboring state's limits; thinking 0.08% is the CDL threshold; holding a phone at a red light; assuming right turn on red is always illegal in Massachusetts.