Which traffic signal requires a complete stop?
Correct answer: A. – A flashing red circle
In Massachusetts, a flashing red signal requires a complete stop. Stop at the marked stop line or, if none exists, before the crosswalk or at the nearest point where you can see intersecting traffic. After stopping, yield to vehicles that present an immediate hazard before proceeding.
Source: M.G.L. c. 89, § 9 – Designation of highways as through ways; traffic control signs and devices, Massachusetts Driver’s Manual — Ch. 4, “Motor Vehicle Signals”

