A 3-minute lesson from the Michigan course. Read the rules and examples, follow the handbook page references, and check your understanding before you move on.
Work zones change lanes, lower speeds and put people right next to traffic. Michigan doubles fines there and adds extra speeding points, so slow down and follow every sign and flagger.
Know the rule
Work-area warning signs are diamond-shaped with black lettering on an orange or yellow background.
Work zone signs may mean part of a lane, a whole lane or the whole road is blocked, or that work is next to the road, on shoulders or in ditches. Zones may last a short time or one or more seasons, with signs posted in advance.
When lanes merge in a work zone, white-and-orange barrels and signs mark the merge. Follow the signs on when and how to merge, and watch for workers using signs or hand signals.
State and local road agencies may add flashing or oscillating green lights to maintenance vehicles, used only during road work. Private contractors may not use green lights. When you see them, slow down and drive with caution.
A "Where Workers Present 45" zone has no workers today. You may drive at the normal posted speed — but if you speed there when workers are present, the fine is doubled and 16 mph over earns 5 points.
Check your understanding
Read the question, decide on an answer, then open it to check the explanation. These are Roadwise study questions based on the source handbook.
What shape and colors are used for construction and maintenance warning signs?
Octagon, white on red
Diamond, black lettering on orange or yellow
Rectangle, black on white
Round, blue and white
Answer: Diamond, black lettering on orange or yellow
Construction warning signs are diamond-shaped with black lettering on an orange or yellow background.
Who is allowed to use flashing green lights on a maintenance vehicle?
Only state and local road agencies
State and local road agencies, plus private contractors
Any private contractor doing road work
Any commercial vehicle escorting a wide load
Answer: Only state and local road agencies
Michigan law allows state and local road agencies to equip maintenance vehicles with flashing green lights; private contractors are not allowed to use them.
