KDOT Traffic Signal & Signage Installation 2 — Questions and Answers
Question 1: What is the minimum mounting height for a highway sign over a roadway with no curb, measured from the bottom of the sign to the road surface?
- 5 feet
- 7 feet (Correct answer)
- 10 feet
- 15 feet
Correct answer: 7 feet
MUTCD requires a minimum mounting height of 7 feet from the bottom of the sign to the near edge of the pavement on roads without curbs.
Question 2: When installing a traffic signal cabinet, what is the primary purpose of grounding the cabinet?
- To improve signal timing accuracy
- To protect against electrical faults and lightning strikes (Correct answer)
- To reduce power consumption
- To ensure proper communication with the traffic management center
Correct answer: To protect against electrical faults and lightning strikes
Grounding the signal cabinet protects equipment and personnel from electrical faults, surges, and lightning strikes.
Question 3: According to KDOT standards, what retroreflective sheeting material is typically required for regulatory signs on the state highway system?
- Engineering Grade (Type I)
- High Intensity Prismatic (Type III) or higher (Correct answer)
- Diamond Grade (Type IX)
- Non-reflective paint only
Correct answer: High Intensity Prismatic (Type III) or higher
KDOT and MUTCD generally require High Intensity Prismatic (Type III) or higher retroreflective sheeting for regulatory signs on state highways.
Question 4: A traffic signal phase refers to which of the following?
- The total cycle length of the signal
- The time allocated to a specific movement or set of movements receiving the right-of-way (Correct answer)
- The minimum green time allowed for pedestrians
- The flashing yellow arrow interval
Correct answer: The time allocated to a specific movement or set of movements receiving the right-of-way
A signal phase is the portion of the signal cycle allocated to one or more traffic movements receiving simultaneous right-of-way.
Question 5: What clearance distance must typically be maintained between the face of a sign and the edge of the traveled way on a rural highway?
- 1 foot
- 4 feet
- 6 feet (Correct answer)
- 12 feet
Correct answer: 6 feet
MUTCD specifies a minimum lateral clearance of 6 feet between the edge of the traveled way and the face of roadside signs on rural highways.
Question 6: When installing signal heads at an intersection, what is the minimum required number of signal faces that must be visible to approaching drivers on a major approach?
- One face
- Two faces (Correct answer)
- Three faces
- Four faces
Correct answer: Two faces
MUTCD requires at least two signal faces visible to each approach to ensure redundancy if one face is obstructed.
Question 7: Which document governs the placement and design of traffic control devices on public roads in Kansas?
- Kansas Administrative Regulation 36-39
- AASHTO Green Book
- Manual on Uniform Traffic Control Devices (MUTCD) (Correct answer)
- Kansas Highway Design Manual only
Correct answer: Manual on Uniform Traffic Control Devices (MUTCD)
The MUTCD, adopted by KDOT, is the federal standard governing the placement, design, and operation of all traffic control devices on public roads.
KDOT Traffic Signal & Signage Installation 2
What is the minimum mounting height for a highway sign over a roadway with no curb, measured from the bottom of the sign to the road surface?