IMSA LEVEL 1 CERTIFICATION (TRAFFIC SIGNALS &
WORK ZONE SAFETY) EXAM COMPLETE QUESTIONS
WITH 100% CORRECT ANSWERS
1
Which type of assembly provides the maximum support length to cross
over a street?
Correct Answer: Truss type assemblies
2
What are used to warn the traveling public of any changes or work on
the road ahead, also known as variable/dynamic message signs?
Correct Answer: Changeable message signs
3
What are more stable than cones but harder to transport?
Correct Answer: Drums/barrels
4
Accessible pedestrian signals usually include what feature?
Correct Answer: A signal device with audible and/or vibrotactile
indications of the walk interval
5
Free-swinging signal heads are located on which support system?
Correct Answer: Span wires
, 6
Full visors are used for what purpose?
Correct Answer: To encircle the entry signal lens and shield displays in
applications where multiple directions are combined
7
Where are monotube supports typically used?
Correct Answer: Very large intersections where mast arms cannot reach
far enough
8
Pedestrian detection provides the means to inform what?
Correct Answer: The traffic signal controller of a person desiring to cross
the intersection
9
What are span wire supports made up of?
Correct Answer: Two or more poles that support wires to which signal
heads and cables are attached
10
Strain poles are manufactured specifically to handle what?
Correct Answer: The strain of the load from span wires and traffic
signals
11
Where are trusses used?
Correct Answer: Extremely large intersections not serviceable by mast
arms, span wires, or monotube supports
12
Tunnel visors are used for what purpose?
WORK ZONE SAFETY) EXAM COMPLETE QUESTIONS
WITH 100% CORRECT ANSWERS
1
Which type of assembly provides the maximum support length to cross
over a street?
Correct Answer: Truss type assemblies
2
What are used to warn the traveling public of any changes or work on
the road ahead, also known as variable/dynamic message signs?
Correct Answer: Changeable message signs
3
What are more stable than cones but harder to transport?
Correct Answer: Drums/barrels
4
Accessible pedestrian signals usually include what feature?
Correct Answer: A signal device with audible and/or vibrotactile
indications of the walk interval
5
Free-swinging signal heads are located on which support system?
Correct Answer: Span wires
, 6
Full visors are used for what purpose?
Correct Answer: To encircle the entry signal lens and shield displays in
applications where multiple directions are combined
7
Where are monotube supports typically used?
Correct Answer: Very large intersections where mast arms cannot reach
far enough
8
Pedestrian detection provides the means to inform what?
Correct Answer: The traffic signal controller of a person desiring to cross
the intersection
9
What are span wire supports made up of?
Correct Answer: Two or more poles that support wires to which signal
heads and cables are attached
10
Strain poles are manufactured specifically to handle what?
Correct Answer: The strain of the load from span wires and traffic
signals
11
Where are trusses used?
Correct Answer: Extremely large intersections not serviceable by mast
arms, span wires, or monotube supports
12
Tunnel visors are used for what purpose?
