TRAFFIC SUPERVISOR EXAM QUESTIONS WITH CORRECT
ANSWERS UPDATED 2026.
When cones are substituted for drums for nighttime closers, what is the minimum cone height
requirement?
A. 18"
B. 28"
C. 36"
D. 42"
42"
When cones are substituted for drums at nighttime closer, what is the maximum cone spacing?
A. 20'
B. 30'
C. 40'
D. 50'
40'
What type of flashing warning lights are required when there is a nighttime lane closer?
A. ROAD WORK AHEAD
B. LANE CLOSED AHEAD
C. A & B
D. NONE OF THE ABOVE
ROAD WORK AHEAD
&
LANE CLOSED AHEAD
If there is a lane closure of greater than three days, what is required?
A. Work zone dotted lines, 4' in length separated by 10' gaps, shall be provided to identify the merge.
B. The appropriate color work zone edge lines shall be applied along the taper and tangent sections.
C. All the above
D. None of the above
The appropriate color work zone edge lines shall be applied along the taper and tangent sections.
Page 1 of 59
,Work zone pavement marking that conflict with final traffic lanes shall be temporary paint.
A. True
B. False
False
What are the extra advance warning signs?
A. Lane Close Ahead
B. Watch for Stopped Traffic
C. Road Work Ahead
D. All the above
Lane Change Ahead
&
Watch for Stopped Traffic
&
Road Work Ahead
Is the advisory speed plaque used in all traffic zones?
A. True
B. False
False
When the approach speed limit is 40 mph or less, 36" warning signs may be used.
A. True
B. False
True
Road Work Ahead signs shall be provided on entrance ramps or roadways entering the work limits.
A. True
B. False
True
Is a shadow vehicle used in all traffic zones?
A. True
Page 2 of 59
,B. False
False
The shadow vehicle is occupied whenever workers are in the work area.
A. True
B. False
False
What class one light is the shadow vehicle equipped with?
A. Flashing Yellow Light
B. Oscillating Yellow Light
C. Yellow Strobe Light
D. All of the above
All of the above
When may cones be substituted for drums?
A. Daytime traffic control minimum height 18"
B. Daytime traffic control minimum height 28"
C. Daytime traffic control minimum height 36"
D. Daytime traffic control minimum height 42"
Daytime traffic control minimum height 28"
When may cones be substituted for drums?
A. Daytime traffic control minimum height 18"
B. Daytime traffic control minimum height 28"
C. Daytime traffic control minimum height 36"
D. Daytime traffic control minimum height 42"
Daytime traffic control minimum height 28"
End Road Work signs are only required for lane closures of more than ______ day.
A. 1
B. 2
C. 3
D4
Page 3 of 59
, 1
Sign spacing should be adjusted to avoid conflict with existing signs, minimum spacing to existing signs
shall be 200' for speeds of 45 mph or less and a minimum of 400' for speeds 50 mph or greater.
A. True
B. False
True
The minimum acceptable length for the merge taper shall be determined by _________ the width of the
offset by the merge taper rate.
A. Subtracting
B. Adding
C. Divide
D. Multiplying
Multiplying
The tangent (recovery area) section between the two merge tapers should be 2 times longer of the two
merge tapers.
A. True
B. False
True
What is a fundamental principle of temporary traffic control?
A. To inconvenience motorists as much as possible so they will find another route.
B. To guide and direct motorists through or around the work area as efficiently as possible. C. To make
traffic move as slow as possible.
D. All of the above are fundamental principles.
To guide and direct motorists through or around the work area as efficiently as possible.
What needs to be done when work is suspended for any length of time?
A. Take down the ROAD WORK AHEAD sign
B. Cover up the END ROAD WORK sign
C. Erect a WORK SUSPENDED sign
D. Cover or remove the FLAGGER AHEAD sign
Cover or remove the FLAGGER AHEAD sign
Page 4 of 59
ANSWERS UPDATED 2026.
When cones are substituted for drums for nighttime closers, what is the minimum cone height
requirement?
A. 18"
B. 28"
C. 36"
D. 42"
42"
When cones are substituted for drums at nighttime closer, what is the maximum cone spacing?
A. 20'
B. 30'
C. 40'
D. 50'
40'
What type of flashing warning lights are required when there is a nighttime lane closer?
A. ROAD WORK AHEAD
B. LANE CLOSED AHEAD
C. A & B
D. NONE OF THE ABOVE
ROAD WORK AHEAD
&
LANE CLOSED AHEAD
If there is a lane closure of greater than three days, what is required?
A. Work zone dotted lines, 4' in length separated by 10' gaps, shall be provided to identify the merge.
B. The appropriate color work zone edge lines shall be applied along the taper and tangent sections.
C. All the above
D. None of the above
The appropriate color work zone edge lines shall be applied along the taper and tangent sections.
Page 1 of 59
,Work zone pavement marking that conflict with final traffic lanes shall be temporary paint.
A. True
B. False
False
What are the extra advance warning signs?
A. Lane Close Ahead
B. Watch for Stopped Traffic
C. Road Work Ahead
D. All the above
Lane Change Ahead
&
Watch for Stopped Traffic
&
Road Work Ahead
Is the advisory speed plaque used in all traffic zones?
A. True
B. False
False
When the approach speed limit is 40 mph or less, 36" warning signs may be used.
A. True
B. False
True
Road Work Ahead signs shall be provided on entrance ramps or roadways entering the work limits.
A. True
B. False
True
Is a shadow vehicle used in all traffic zones?
A. True
Page 2 of 59
,B. False
False
The shadow vehicle is occupied whenever workers are in the work area.
A. True
B. False
False
What class one light is the shadow vehicle equipped with?
A. Flashing Yellow Light
B. Oscillating Yellow Light
C. Yellow Strobe Light
D. All of the above
All of the above
When may cones be substituted for drums?
A. Daytime traffic control minimum height 18"
B. Daytime traffic control minimum height 28"
C. Daytime traffic control minimum height 36"
D. Daytime traffic control minimum height 42"
Daytime traffic control minimum height 28"
When may cones be substituted for drums?
A. Daytime traffic control minimum height 18"
B. Daytime traffic control minimum height 28"
C. Daytime traffic control minimum height 36"
D. Daytime traffic control minimum height 42"
Daytime traffic control minimum height 28"
End Road Work signs are only required for lane closures of more than ______ day.
A. 1
B. 2
C. 3
D4
Page 3 of 59
, 1
Sign spacing should be adjusted to avoid conflict with existing signs, minimum spacing to existing signs
shall be 200' for speeds of 45 mph or less and a minimum of 400' for speeds 50 mph or greater.
A. True
B. False
True
The minimum acceptable length for the merge taper shall be determined by _________ the width of the
offset by the merge taper rate.
A. Subtracting
B. Adding
C. Divide
D. Multiplying
Multiplying
The tangent (recovery area) section between the two merge tapers should be 2 times longer of the two
merge tapers.
A. True
B. False
True
What is a fundamental principle of temporary traffic control?
A. To inconvenience motorists as much as possible so they will find another route.
B. To guide and direct motorists through or around the work area as efficiently as possible. C. To make
traffic move as slow as possible.
D. All of the above are fundamental principles.
To guide and direct motorists through or around the work area as efficiently as possible.
What needs to be done when work is suspended for any length of time?
A. Take down the ROAD WORK AHEAD sign
B. Cover up the END ROAD WORK sign
C. Erect a WORK SUSPENDED sign
D. Cover or remove the FLAGGER AHEAD sign
Cover or remove the FLAGGER AHEAD sign
Page 4 of 59
