The posted limit is 55 mph, but the road is wet. What speed reduction does the driver manual give as a general guideline?
Correct answer: B – 5 to 10 mph below the limit
The Maine manual gives a reduction of 5 to 10 mph as a general guideline for wet roads. This does not guarantee that 45 to 50 mph is always safe. State law requires a careful and prudent speed based on the road surface, traffic, visibility, and other existing conditions, which may require a greater reduction.
Source: M.R.S. Title 29-A, § 2074 – Rates of speed, Maine Driver’s License Manual — § 8, “Slippery Roads”




