MOT Advanced Warning Sign Placement 5 — Questions and Answers
Question 1: A freeway work zone is located immediately after an entrance ramp. Where should advance warning signs be placed relative to the ramp?
- Only after the merge point on the mainline
- Upstream of the ramp on the mainline AND on the ramp itself to warn merging traffic (Correct answer)
- On the ramp gore only
- At the ramp terminal intersection with local roads
Correct answer: Upstream of the ramp on the mainline AND on the ramp itself to warn merging traffic
Both mainline traffic and merging ramp traffic must be warned, so signs are required on both the mainline upstream and on the entrance ramp.
Question 2: Which MUTCD chapter specifically governs temporary traffic control, including advance warning sign placement?
- Chapter 2
- Chapter 4
- Chapter 6 (Correct answer)
- Chapter 8
Correct answer: Chapter 6
MUTCD Chapter 6 covers all temporary traffic control elements, including advance warning area design and sign placement.
Question 3: What is the recommended sign spacing between multiple advance warning signs when three signs are used on a 55 mph roadway?
- 100 feet between each sign
- Equal spacing of roughly 500 feet between each sign
- The spacing should vary, with greater spacing between signs farther from the work zone (Correct answer)
- All signs should be clustered within 200 feet of each other
Correct answer: The spacing should vary, with greater spacing between signs farther from the work zone
MUTCD guidance suggests larger spacing between signs at greater distances from the work zone, decreasing as drivers approach, mirroring the progressive warning concept.
Question 4: A utility crew needs to close a travel lane on a 65 mph interstate for two hours during daylight. Which temporary sign sheeting type is the minimum required by MUTCD?
- Type I (engineering grade)
- Type II (super engineering grade)
- Type III (diamond grade or equivalent high-intensity) (Correct answer)
- Any fluorescent sheeting regardless of type
Correct answer: Type III (diamond grade or equivalent high-intensity)
MUTCD requires Type III or higher retroreflective sheeting for TTC signs on high-speed roadways (≥45 mph) to ensure adequate visibility.
Question 5: When a work zone sign is damaged or knocked over during the project, what is the immediate responsibility of the MOT supervisor?
- Document it and replace it at the end of the shift
- Restore or replace the sign immediately to maintain compliant traffic control (Correct answer)
- Call the project engineer before taking any action
- Leave it and add extra cones nearby as a substitute
Correct answer: Restore or replace the sign immediately to maintain compliant traffic control
Any downed or damaged sign must be promptly restored because missing advance warning creates immediate hazard and liability for workers and the public.
Question 6: On a multi-lane urban arterial with a 40 mph speed limit, a work zone advance warning sign should be legible from at least how far away?
- 100 feet
- 200 feet
- 400 feet (Correct answer)
- 600 feet
Correct answer: 400 feet
MUTCD's legibility distance standard requires that signs be readable from at least 400 feet on 40 mph facilities to allow sufficient driver reaction time.
Question 7: Which of the following best describes the 'advance warning area' in a temporary traffic control zone?
- The area where workers are actively performing tasks
- The section of road where drivers are notified of conditions ahead through signs and other devices (Correct answer)
- The taper section that transitions traffic out of the normal path
- The downstream buffer zone at the end of the work space
Correct answer: The section of road where drivers are notified of conditions ahead through signs and other devices
The advance warning area is the roadway section where drivers receive initial notification—through signs, signals, or other devices—that a work zone lies ahead.
MOT Advanced Warning Sign Placement 5
A freeway work zone is located immediately after an entrance ramp.
Where should advance warning signs be placed relative to the ramp?