2-6-9 Flagging, Signs, and Barricades – Part IV Flashcards
Normally, __?__ are used to light flagger stations, or work spaces during hours of darkness.
floodlights
The type of lighting used during nighttime hours to delineate the edge of the traveled way are the __?__.
Type C Steady-Burn
The three types of electric lights that are used to alert and guide motorists and pedestrians safely around a work site are floodlights, steady-burning lights, and __?__ lights.
warning
High-intensity flashing lights are considered __?__ warning lights.
Type B
Low-intensity flashing lights should be visible from a distance of __?__ on a clear night.
3,000’
An arrow board shall be a sign with a matrix of elements capable of a fishing display only.
False
Which item below is NOT a mode selection for an arrow board?
flashing emergency stop
Arrow panels should not be used if there are mobile operations on a high-speed travel lane of a multi-lane divided highway.
False
A flashing arrow display should be used to indicate a shoulder closure.
False
The minimum mounting height for an arrow panel that is not attached to a vehicle is __?__ from the roadway to the bottom of the panel.
7’
The text displayed on all portable, changeable message signs used in the United States must scroll vertically from left to right.
False
Portable changeable message signs are used most frequently on __?__.
high-density urban freeways
When utilizing a portable changeable message sign, the message should be visible for at least __?__ in day and night conditions.
1/2 mi
Except in emergencies, flagging stations shall be __?__ at night.
illuminated
Portable changeable message signs should be used as a supplement to and not as a substitute for conventional signs and pavement markings.
True
