IMSA WORK ZONE SAFETY EXAM QUESTIONS AND ANSWERS (VERIFIED AND
WELL DETAILED ANSWER) LATEST 2025/2026
Work zone sign in rural area Clear Zone (Distance from sign to edge of traveled way) - CORRECT
ANSWER - 6 to 12 ft
Work zone sign in business, commercial, or residential area with curb clear zone (Distance from
sign to edge of traveled way) - CORRECT ANSWER - 2 ft min
Work zone sign in business, commercial, or residential area without curb clear zone (Distance
from sign to edge of traveled way) - CORRECT ANSWER - 6 to 12 ft
Methods of mounting signs other than on posts - CORRECT ANSWER - Flag tree, barrier,
portable, tripod
Distance between signs - urban (low speed) - CORRECT ANSWER - 100 ft
Distance between signs - urban (high speed) - CORRECT ANSWER - 350
Distance between signs - rural - CORRECT ANSWER - 500 ft
Distance between signs - expressway/freeway - CORRECT ANSWER - 1000, 1500, 2640 (A, B, C)
Flashing arrow modes - CORRECT ANSWER - Flashing arrow, sequential arrow, sequential
chevron, flashing double arrow, flashing caution, alternating diamond caution
,What does a flashing arrow on an arrow board mean? - CORRECT ANSWER - Merge right
What does a sequential arrow on an arrow board mean? - CORRECT ANSWER - Merge right
What does a flashing double arrow on an arrow board mean? - CORRECT ANSWER - Merge right
or left
What does a flashing caution mean? - CORRECT ANSWER - Flashing caution
Arrow board type A minimum size - CORRECT ANSWER - 48x24 inches
Arrow board type A minimum legibility distance - CORRECT ANSWER - 1/2 mile
Arrow board type A minimum number of elements - CORRECT ANSWER - 12
Arrow board type B minimum size - CORRECT ANSWER - 60 x 30 inches
Arrow board type B minimum legibility distance - CORRECT ANSWER - 3/4 mile
Arrow board type B minimum number of elements - CORRECT ANSWER - 13
Arrow board type C minimum size - CORRECT ANSWER - 96 x 48 inches
arrow board type C minimum legibility distance - CORRECT ANSWER - 1 mile
arrow board type c minimum number of elements - CORRECT ANSWER - 15
,How many reflectorized bands (white) are on a drum? - CORRECT ANSWER - 2
What direction should a reflector on a drum face? - CORRECT ANSWER - Facing traffic
Minimum height and diameter of a traffic drum? - CORRECT ANSWER - 36 inches min, 18 inch
diameter min
Minimum height of a tubular marker? (Night and/or freeway high speed roadway) - CORRECT
ANSWER - 28 inches
Minimum reflective bands on a tubular marker? (Night and/or freeway high speed roadway) -
CORRECT ANSWER - 2
Minimum height of a tubular marker (day/low speed roadway < 40 mph) - CORRECT ANSWER -
18 inches, 1 reflective band
Minimum height and how many reflective bands on a traffic cone ((Night and/or freeway high
speed roadway) - CORRECT ANSWER - 28" 2 reflective bands
Minimum height and how many reflective bands of a cone (day/low speed roadway < 40 mph) -
CORRECT ANSWER - 18 inches
Minimum height to be cane detectable? (cones, drums, etc) - CORRECT ANSWER - 36 inches
Preferred method (stop/slow paddle or red flag?) - CORRECT ANSWER - stop/slow paddle is
preferred
, Flagger - to stop, to proceed, to alert and slow down (movements) - CORRECT ANSWER - Flag
out 90 degrees, flag down, flag up and down up to 90 degrees
What is the purpose of a taper? - CORRECT ANSWER - moves traffic out of its normal path
buffer space purpose? - CORRECT ANSWER - provides protection to traffic and workers
Buffer space longitudinal and downstream taper purpose? - CORRECT ANSWER - Lets traffic
resume normal operations
longitudinal buffer - CORRECT ANSWER - provides motorists space to regain control of their
vehicles if they miss the advance warning signs and overshoot the flagging station
merging taper - CORRECT ANSWER - L
shifting taper - CORRECT ANSWER - at least 1/2 L
shoulder taper - CORRECT ANSWER - at least 1/3 L
one lane, two way taper - CORRECT ANSWER - 100 ft maximum
downstream taper - CORRECT ANSWER - 100 ft per lane
speed limits of 40 mph or less taper - CORRECT ANSWER - ws^2/60
speed limits over 40 mph - CORRECT ANSWER - l=ws
WELL DETAILED ANSWER) LATEST 2025/2026
Work zone sign in rural area Clear Zone (Distance from sign to edge of traveled way) - CORRECT
ANSWER - 6 to 12 ft
Work zone sign in business, commercial, or residential area with curb clear zone (Distance from
sign to edge of traveled way) - CORRECT ANSWER - 2 ft min
Work zone sign in business, commercial, or residential area without curb clear zone (Distance
from sign to edge of traveled way) - CORRECT ANSWER - 6 to 12 ft
Methods of mounting signs other than on posts - CORRECT ANSWER - Flag tree, barrier,
portable, tripod
Distance between signs - urban (low speed) - CORRECT ANSWER - 100 ft
Distance between signs - urban (high speed) - CORRECT ANSWER - 350
Distance between signs - rural - CORRECT ANSWER - 500 ft
Distance between signs - expressway/freeway - CORRECT ANSWER - 1000, 1500, 2640 (A, B, C)
Flashing arrow modes - CORRECT ANSWER - Flashing arrow, sequential arrow, sequential
chevron, flashing double arrow, flashing caution, alternating diamond caution
,What does a flashing arrow on an arrow board mean? - CORRECT ANSWER - Merge right
What does a sequential arrow on an arrow board mean? - CORRECT ANSWER - Merge right
What does a flashing double arrow on an arrow board mean? - CORRECT ANSWER - Merge right
or left
What does a flashing caution mean? - CORRECT ANSWER - Flashing caution
Arrow board type A minimum size - CORRECT ANSWER - 48x24 inches
Arrow board type A minimum legibility distance - CORRECT ANSWER - 1/2 mile
Arrow board type A minimum number of elements - CORRECT ANSWER - 12
Arrow board type B minimum size - CORRECT ANSWER - 60 x 30 inches
Arrow board type B minimum legibility distance - CORRECT ANSWER - 3/4 mile
Arrow board type B minimum number of elements - CORRECT ANSWER - 13
Arrow board type C minimum size - CORRECT ANSWER - 96 x 48 inches
arrow board type C minimum legibility distance - CORRECT ANSWER - 1 mile
arrow board type c minimum number of elements - CORRECT ANSWER - 15
,How many reflectorized bands (white) are on a drum? - CORRECT ANSWER - 2
What direction should a reflector on a drum face? - CORRECT ANSWER - Facing traffic
Minimum height and diameter of a traffic drum? - CORRECT ANSWER - 36 inches min, 18 inch
diameter min
Minimum height of a tubular marker? (Night and/or freeway high speed roadway) - CORRECT
ANSWER - 28 inches
Minimum reflective bands on a tubular marker? (Night and/or freeway high speed roadway) -
CORRECT ANSWER - 2
Minimum height of a tubular marker (day/low speed roadway < 40 mph) - CORRECT ANSWER -
18 inches, 1 reflective band
Minimum height and how many reflective bands on a traffic cone ((Night and/or freeway high
speed roadway) - CORRECT ANSWER - 28" 2 reflective bands
Minimum height and how many reflective bands of a cone (day/low speed roadway < 40 mph) -
CORRECT ANSWER - 18 inches
Minimum height to be cane detectable? (cones, drums, etc) - CORRECT ANSWER - 36 inches
Preferred method (stop/slow paddle or red flag?) - CORRECT ANSWER - stop/slow paddle is
preferred
, Flagger - to stop, to proceed, to alert and slow down (movements) - CORRECT ANSWER - Flag
out 90 degrees, flag down, flag up and down up to 90 degrees
What is the purpose of a taper? - CORRECT ANSWER - moves traffic out of its normal path
buffer space purpose? - CORRECT ANSWER - provides protection to traffic and workers
Buffer space longitudinal and downstream taper purpose? - CORRECT ANSWER - Lets traffic
resume normal operations
longitudinal buffer - CORRECT ANSWER - provides motorists space to regain control of their
vehicles if they miss the advance warning signs and overshoot the flagging station
merging taper - CORRECT ANSWER - L
shifting taper - CORRECT ANSWER - at least 1/2 L
shoulder taper - CORRECT ANSWER - at least 1/3 L
one lane, two way taper - CORRECT ANSWER - 100 ft maximum
downstream taper - CORRECT ANSWER - 100 ft per lane
speed limits of 40 mph or less taper - CORRECT ANSWER - ws^2/60
speed limits over 40 mph - CORRECT ANSWER - l=ws
