Under Massachusetts pavement-marking guidance, which centerline prohibits passing by traffic in both directions?
Correct answer: C – Two solid yellow lines
Two solid yellow lines separate traffic moving in opposite directions and prohibit drivers on either side from crossing them to pass. The lines may be crossed to make a left turn when that movement is permitted and safe. A broken yellow line allows passing when conditions permit.
Source: Massachusetts Driver’s Manual — Ch. 4, “Yellow Lane Lines”



