15. Traffic Control Design Flashcards
MUTCD requires what minimum sign lettering size specific ratio?
1:30 (1in = 30 ft)
Minimum height of over head sign?
17 ft
When are delineators beneficial?
Locations where alignment might be confusing or unexpected.
Where should delineator be placed?
2 to 8 ft outside the outer edge of the shoulder, or in line with the roadside barrier that is 8 ft or less outside the outer edge of the shoulder.
What is the minimum spacing for delineators?
20 ft
What is the maximum spacing for delineators on curves?
300 ft
What is the maximum spacing for tapper channelizing devices?
1 x speed limit
What is the maximum spacing for tangent channelizing devices?
2 x speed limit
What is the normal line width for pavement lines?
4 to 6 in
For crosswalks, lines shall not be less than ____ inches nor more than _____ in width and should not be placed less than ______ feet apart.
6 in, 24 in, 6 ft
Stop bars lines widths are typically?
12 to 24 inches
The bottom of the signal housing and any related attachments to a vehicular signal face located over any portion of a highway that can be used by motor vehicles shall be ________________.
at least 15 ft above the pavement
The top of the signal housing of a vehicular signal face located over any portion of a highway that can be used by motor vehicles shall not be ______________.
more that 25.6 ft above the pavement
What are the four components of a temporary Traffic Control Zone?
Advanced Warning, Transition, Activity, Termination
What is the minimum advance warning sign for Urban (low speed)?
100 ft
What is the minimum advance warning sign for Urban (high speed)?
350 ft
What is the minimum advance warning sign for Rural?
500 ft
What is the minimum advance warning sign for Expressway /Freeway?
1,000, 1,500, 2640 ft
During flagging operations what is the maximum taper length and channelizing device spacing?
100 ft, 20 ft
Name the type of tapers.
Merging, Shifting, Shoulder, One-Lane (two-way traffic), downstream.
What are the taper length for each type of taper?
L, 0.5L, 0.33L, 100 ft (max)., 100 ft per lane
