7C. Traffic Signal Design Flashcards
Where can a Vertical Signal Face design be found
MUTCD Chapter 4, Section 4D.09
What are the Typical Arrangements of Signal Sections in Signal Faces That Do Not Control Turning Movements for a vertical signal face
R
Y
G (or green arrow)
Figure 4D-2
What are the Typical Arrangements of Signal Sections in Signal Faces That Do Not Control Turning Movements for a horizontal signal face
R Y G (or green arrow)
Could also be
R R Y G
Figure 4D-2
The relative positions of signal sections in a vertically-arranged signal face, from top to bottom, shall be as follows:
Section 4D.09
CIRCULAR RED
Steady and/or flashing left-turn RED ARROW
Steady and/or flashing right-turn RED ARROW
CIRCULAR YELLOW
CIRCULAR GREEN
Straight-through GREEN ARROW
Steady left-turn YELLOW ARROW
Flashing left-turn YELLOW ARROW
Left-turn GREEN ARROW
Steady right-turn YELLOW ARROW
Flashing right-turn YELLOW ARROW
Right-turn GREEN ARROW
The relative positions of signal sections in a horizontally-arranged signal face, from left to right, shall be as follows:
Section 4D.10
CIRCULAR RED
Steady and/or flashing left-turn RED ARROW
Steady and/or flashing right-turn RED ARROW
CIRCULAR YELLOW
Steady left-turn YELLOW ARROW
Flashing left-turn YELLOW ARROW
Left-turn GREEN ARROW
CIRCULAR GREEN
Straight-through GREEN ARROW
Steady right-turn YELLOW ARROW
Flashing right-turn YELLOW ARROW
Right-turn GREEN ARROW
What is the minimum and maximum height for the signal housing for any portion of a highway.
Section 4D.15 Mounting Height of Signal Faces
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 feet 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 than 25.6 feet above the pavement.
What is the minimum height the bottom of the signal housing (including brackets) of a vehicular signal face that is vertically
arranged and not located over a roadway:
Section 4D.15 Mounting Height of Signal Faces
A. Shall be a minimum of 8 feet and a maximum of 19 feet above the sidewalk or, if there is no sidewalk, above the pavement grade at the center of the roadway.
B. Shall be a minimum of 4.5 feet and a maximum of 19 feet above the median island grade of a center median island if located on the near side of the intersection.
What is the minimum height the bottom of the signal housing (including brackets) of a vehicular signal face that is horizontally
arranged and not located over a roadway:
Section 4D.15 Mounting Height of Signal Faces
A. Shall be a minimum of 8 feet and a maximum of 22 feet above the sidewalk or, if there is no sidewalk, above the pavement grade at the center of the roadway.
B. Shall be a minimum of 4.5 feet and a maximum of 22 feet above the median island grade of a center median island if located on the near side of the intersection.
