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34 questions from the flagger and work zone traffic control practice test.
10 questions, graded as you go, with the reason for every answer. No sign-up.
Which formula gives the taper length L for a posted speed of 40 mph or less (W = offset width in feet, S = speed in mph)?
B. L = W × S × S ÷ 60
At 40 mph or less, L = WS²/60. L = WS is the formula for 45 mph and above, and using it at low speed gives a taper far longer than needed.
Reference: MUTCD Part 6, tapers and taper length tables (2009 Edition Section 6C.08, Tables 6C-3 and 6C-4)
Which formula gives the taper length L for a posted speed of 45 mph or more (W = offset width in feet, S = speed in mph)?
D. L = W × S
At 45 mph or more, L = WS. The WS²/60 formula applies only at 40 mph or less.
Reference: MUTCD Part 6, tapers and taper length tables (2009 Edition Section 6C.08, Tables 6C-3 and 6C-4)
In the taper length formulas, what does W stand for?
A. The width of the offset, in feet
W is the width of the offset, meaning how far traffic is moved sideways, usually the width of the closed lane. It is not the full roadway width.
Reference: MUTCD Part 6, tapers and taper length tables (2009 Edition Section 6C.08, Tables 6C-3 and 6C-4)