Correct answer: Pedestrians, roadside workers, bicyclists and skaters
The law covers pedestrians, roadside workers, bicyclists, people on horses or in horse-drawn carriages, and people using wheelchairs, scooters, skateboards, roller skates and similar devices.
Source: Chapter 2: Safety First β Vulnerable Road Users Law (Massachusetts Driver's Manual, rev. April 2026, PDF p. 57)