FDOT Standard Plans (102 Series) and MUTCD Exam With
Correct Answers 2026/2027.
1. A contractor is set to perform a long-term lane closure on a multilane divided highway with a
posted speed of 65 mph. According to FDOT Standard Plans Index 102-613, what is the
required length of the merging taper for a 12-foot wide lane, and what is the minimum
distance required for the longitudinal buffer space?
Correct Answer: The merging taper (L) is calculated as W x S (12 x 65), which equals 780 feet.
The longitudinal buffer space for a 65 mph facility must be a minimum of 645 feet.
2. Describe the specific retroreflective requirements for Type III Barricades used for a full road
closure during nighttime hours. Include the width of the stripes and the direction they must
slope.
Correct Answer: The rails must have 6-inch wide alternating orange and white retroreflective
stripes. The stripes must slope downward at a 45-degree angle toward the side where traffic
is intended to pass; for a full road closure, they should slope toward the center of the
barricade or the detour path.
3. When a work zone is located on a high-speed limited-access facility (70 mph), what is the
required spacing (Spacing C) between the first "Road Work Ahead" sign and the second
"Right Lane Closed Ahead" sign?
Correct Answer: On limited-access facilities, the spacing between advance warning signs is
1,500 feet.
4. If a drop-off hazard of 6 inches is created adjacent to a travel lane on a 45 mph roadway, and
it will remain for more than 48 hours, what is the mandatory mitigation requirement
according to FDOT Index 102-600?
Correct Answer: A drop-off of more than 5 inches within the clear zone for more than 48
hours requires the installation of a temporary barrier wall (Type K or similar) to protect traffic
from the hazard.
5. Explain the "clear zone" width requirement for a temporary work zone on a rural highway
with a design speed of 55 mph and no curb.
Correct Answer: The clear zone for a 55 mph rural roadway is typically 18 feet from the edge
of the travel lane.
6. In a flagging operation, what is the minimum length of the "Flagging Taper," and how many
channelizing devices must be used to form it?
Correct Answer: The flagging taper must be between 50 feet and 100 feet long and must
consist of at least 5 channelizing devices.
7. What are the specific requirements for a "Pedestrian LCD" (Longitudinal Channelizing Device)
regarding its height and the detectable surface for the visually impaired?
Correct Answer: The device must be a minimum of 32 inches high and include a continuous
detectable edging that is at least 6 inches high from the ground to be detected by a cane.
8. When using a Truck Mounted Attenuator (TMA) in a mobile operation on a 60 mph road,
what is the required "Roll-Ahead Distance" between the shadow vehicle and the work
vehicle?
, Correct Answer: According to the Roll-Ahead Distance tables, the gap should be between
150 and 175 feet, depending on the weight of the shadow vehicle.
9. A project requires a temporary shift of traffic onto a shoulder. If the shift width is 10 feet and
the speed is 40 mph, calculate the required "Shifting Taper" length.
Correct Answer: For 40 mph, the formula is L = (W x S²) / 60. The shifting taper is 0.5L.
Calculation: 0.5 x ((10 x 40²) / 60) = 0.5 x (16,) = 0.5 x 266.67 = 133.33 feet.
10. What are the two authorized modes of display for an Arrow Board being used for a shoulder
closure on an Interstate?
Correct Answer: The Arrow Board must be in "Caution Mode," which is either the four
corners flashing or a solid horizontal bar.
11. Describe the "Quality Standards" for a work zone sign to be considered "Acceptable" by
FDOT.
Correct Answer: To be acceptable, the sign must have 100% of its legend legible, no
significant fading of the orange background, and no more than 10% of the surface area
covered by scratches or abrasions.
12. When a side street intersects a work zone on the mainline, what is the minimum advance
warning requirement for traffic approaching from the side street?
Correct Answer: A "Road Work Ahead" (W20-1) sign is required on the side street approach.
13. What is the mandatory height for a Type I Barricade, and where is it typically utilized in TTC?
Correct Answer: The minimum height is 36 inches, and it is used for channelization and
pedestrian control in low-speed urban areas.
14. Explain the difference between a "Temporary Diversion" and a "Temporary Detour."
Correct Answer: A diversion shifts traffic onto temporary pavement constructed within or
adjacent to the right-of-way, while a detour routes traffic onto existing alternate roads.
15. If a "Stop" sign is temporarily moved due to construction, what is the maximum allowed
distance from the edge of the travel lane to the sign?
Correct Answer: The sign should be placed between 6 and 12 feet from the edge of the
travel lane in rural areas, or 2 feet from the face of the curb in urban areas.
16. What is the required "Visibility Distance" for a Type C Arrow Board on a high-speed highway?
Correct Answer: A Type C Arrow Board must be visible to drivers from a distance of at least 1
mile.
17. Describe the mandatory "All-Red" interval for a temporary traffic signal at a bridge
construction site.
Correct Answer: The All-Red interval must be long enough to allow a vehicle traveling at the
work zone speed limit to completely clear the single-lane section before the opposing
direction receives a green signal.
18. What is the maximum allowed spacing for drums in a merging taper on a 55 mph road?
Correct Answer: Spacing is equal to the speed limit (S), which is 55 feet.
19. When using "Temporary Raised Pavement Markers" (TRPMs) to delineate a 2-mile lane shift,
what is the required spacing on the tangent sections?
Correct Answer: The spacing must be 40 feet on center.
Correct Answers 2026/2027.
1. A contractor is set to perform a long-term lane closure on a multilane divided highway with a
posted speed of 65 mph. According to FDOT Standard Plans Index 102-613, what is the
required length of the merging taper for a 12-foot wide lane, and what is the minimum
distance required for the longitudinal buffer space?
Correct Answer: The merging taper (L) is calculated as W x S (12 x 65), which equals 780 feet.
The longitudinal buffer space for a 65 mph facility must be a minimum of 645 feet.
2. Describe the specific retroreflective requirements for Type III Barricades used for a full road
closure during nighttime hours. Include the width of the stripes and the direction they must
slope.
Correct Answer: The rails must have 6-inch wide alternating orange and white retroreflective
stripes. The stripes must slope downward at a 45-degree angle toward the side where traffic
is intended to pass; for a full road closure, they should slope toward the center of the
barricade or the detour path.
3. When a work zone is located on a high-speed limited-access facility (70 mph), what is the
required spacing (Spacing C) between the first "Road Work Ahead" sign and the second
"Right Lane Closed Ahead" sign?
Correct Answer: On limited-access facilities, the spacing between advance warning signs is
1,500 feet.
4. If a drop-off hazard of 6 inches is created adjacent to a travel lane on a 45 mph roadway, and
it will remain for more than 48 hours, what is the mandatory mitigation requirement
according to FDOT Index 102-600?
Correct Answer: A drop-off of more than 5 inches within the clear zone for more than 48
hours requires the installation of a temporary barrier wall (Type K or similar) to protect traffic
from the hazard.
5. Explain the "clear zone" width requirement for a temporary work zone on a rural highway
with a design speed of 55 mph and no curb.
Correct Answer: The clear zone for a 55 mph rural roadway is typically 18 feet from the edge
of the travel lane.
6. In a flagging operation, what is the minimum length of the "Flagging Taper," and how many
channelizing devices must be used to form it?
Correct Answer: The flagging taper must be between 50 feet and 100 feet long and must
consist of at least 5 channelizing devices.
7. What are the specific requirements for a "Pedestrian LCD" (Longitudinal Channelizing Device)
regarding its height and the detectable surface for the visually impaired?
Correct Answer: The device must be a minimum of 32 inches high and include a continuous
detectable edging that is at least 6 inches high from the ground to be detected by a cane.
8. When using a Truck Mounted Attenuator (TMA) in a mobile operation on a 60 mph road,
what is the required "Roll-Ahead Distance" between the shadow vehicle and the work
vehicle?
, Correct Answer: According to the Roll-Ahead Distance tables, the gap should be between
150 and 175 feet, depending on the weight of the shadow vehicle.
9. A project requires a temporary shift of traffic onto a shoulder. If the shift width is 10 feet and
the speed is 40 mph, calculate the required "Shifting Taper" length.
Correct Answer: For 40 mph, the formula is L = (W x S²) / 60. The shifting taper is 0.5L.
Calculation: 0.5 x ((10 x 40²) / 60) = 0.5 x (16,) = 0.5 x 266.67 = 133.33 feet.
10. What are the two authorized modes of display for an Arrow Board being used for a shoulder
closure on an Interstate?
Correct Answer: The Arrow Board must be in "Caution Mode," which is either the four
corners flashing or a solid horizontal bar.
11. Describe the "Quality Standards" for a work zone sign to be considered "Acceptable" by
FDOT.
Correct Answer: To be acceptable, the sign must have 100% of its legend legible, no
significant fading of the orange background, and no more than 10% of the surface area
covered by scratches or abrasions.
12. When a side street intersects a work zone on the mainline, what is the minimum advance
warning requirement for traffic approaching from the side street?
Correct Answer: A "Road Work Ahead" (W20-1) sign is required on the side street approach.
13. What is the mandatory height for a Type I Barricade, and where is it typically utilized in TTC?
Correct Answer: The minimum height is 36 inches, and it is used for channelization and
pedestrian control in low-speed urban areas.
14. Explain the difference between a "Temporary Diversion" and a "Temporary Detour."
Correct Answer: A diversion shifts traffic onto temporary pavement constructed within or
adjacent to the right-of-way, while a detour routes traffic onto existing alternate roads.
15. If a "Stop" sign is temporarily moved due to construction, what is the maximum allowed
distance from the edge of the travel lane to the sign?
Correct Answer: The sign should be placed between 6 and 12 feet from the edge of the
travel lane in rural areas, or 2 feet from the face of the curb in urban areas.
16. What is the required "Visibility Distance" for a Type C Arrow Board on a high-speed highway?
Correct Answer: A Type C Arrow Board must be visible to drivers from a distance of at least 1
mile.
17. Describe the mandatory "All-Red" interval for a temporary traffic signal at a bridge
construction site.
Correct Answer: The All-Red interval must be long enough to allow a vehicle traveling at the
work zone speed limit to completely clear the single-lane section before the opposing
direction receives a green signal.
18. What is the maximum allowed spacing for drums in a merging taper on a 55 mph road?
Correct Answer: Spacing is equal to the speed limit (S), which is 55 feet.
19. When using "Temporary Raised Pavement Markers" (TRPMs) to delineate a 2-mile lane shift,
what is the required spacing on the tangent sections?
Correct Answer: The spacing must be 40 feet on center.
