Which of the following is used as a channeling device to direct traffic flow in a work zone?

A.  image
B.  image
C.  image
D.  All of the above
The most commonly used traffic control devices in work zones are signs, barricades, drums, cones, tubes, flashing arrow panels, and flag individuals. Orange is the basic color for these devices.
How did others answer?
A.  12%  B.  6%   C.  28%   D.  54%

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