IMSA LEVEL 1 CERTIFICATION EXAM
QUESTIONS AND ANSWERS GRADED A+
2025/2026
Where are you when you install alternating flashing 12" red lights? - ANS At a railroad
crossing.
Who determins the the standards on traffic control devices and sets the requirements for
uniformity? - ANS The Manual on uniform traffic control devices, (MUTCD).
What is the the voltage that a traffic signal cabinet needs to run all its components? -
ANS 120 volts AC
Where are you when you come across a signal that has a ped pole on each side of the road,
each having a 3 section signal on top followed with a 2 section mounted directly under neath? -
ANS A ramp meter on a ramp to a highway.
What is a flashing signal along the road called? - ANS A flashing beacon.
What is the definition of short term work zone as per the MUTCD? - ANS 1 hour or less
What's OSHA? - ANS Occupational and safety health administration
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Can you get your level III certification and what are they? - ANS Yes, and it's for bench and
field electrician
I'm working near power lines where would I get my clearance from? - ANS CEC, NEC, NESC
What are the three basic types of beacons? - ANS Stop sign beacon, warning beacon, and
flashing beacon.
What is the difference between concurrent and sequential phases? - ANS Concurrent phases,
phases that run together. Sequential phases, are phases that run one at a time.
I have a dual ring controller and all my through phases are even, what do I mean? - ANS The
dual ring phases are 2,4,6,8
What is the cheapest way to coordinate a corridor of signals? What needs to stay the same
throughout the day? - ANS Time based coordination, and cycle length.
Explain the white walking man, the flashing orange hand on a ped head and how is this time
figured? - ANS The white walking man is the ped head walk interval, and the ped change
clearance interval is the flashing orange hand.
What makes up the green interval? - ANS Initial green time, passage/extension/gap time, and
max green time.
At most intersections what are phases 2,6 called, and phases 4,8 called - ANS Phases 2,6 are
called Main Street, and 4,8 are called side street.
Name the three traffic signal systems? - ANS Closed loop, central computer, hybrid systems.
If phase 2 is in recall what will the controller do? - ANS The controller will service that phase
even if there is no need for it.
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
QUESTIONS AND ANSWERS GRADED A+
2025/2026
Where are you when you install alternating flashing 12" red lights? - ANS At a railroad
crossing.
Who determins the the standards on traffic control devices and sets the requirements for
uniformity? - ANS The Manual on uniform traffic control devices, (MUTCD).
What is the the voltage that a traffic signal cabinet needs to run all its components? -
ANS 120 volts AC
Where are you when you come across a signal that has a ped pole on each side of the road,
each having a 3 section signal on top followed with a 2 section mounted directly under neath? -
ANS A ramp meter on a ramp to a highway.
What is a flashing signal along the road called? - ANS A flashing beacon.
What is the definition of short term work zone as per the MUTCD? - ANS 1 hour or less
What's OSHA? - ANS Occupational and safety health administration
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Can you get your level III certification and what are they? - ANS Yes, and it's for bench and
field electrician
I'm working near power lines where would I get my clearance from? - ANS CEC, NEC, NESC
What are the three basic types of beacons? - ANS Stop sign beacon, warning beacon, and
flashing beacon.
What is the difference between concurrent and sequential phases? - ANS Concurrent phases,
phases that run together. Sequential phases, are phases that run one at a time.
I have a dual ring controller and all my through phases are even, what do I mean? - ANS The
dual ring phases are 2,4,6,8
What is the cheapest way to coordinate a corridor of signals? What needs to stay the same
throughout the day? - ANS Time based coordination, and cycle length.
Explain the white walking man, the flashing orange hand on a ped head and how is this time
figured? - ANS The white walking man is the ped head walk interval, and the ped change
clearance interval is the flashing orange hand.
What makes up the green interval? - ANS Initial green time, passage/extension/gap time, and
max green time.
At most intersections what are phases 2,6 called, and phases 4,8 called - ANS Phases 2,6 are
called Main Street, and 4,8 are called side street.
Name the three traffic signal systems? - ANS Closed loop, central computer, hybrid systems.
If phase 2 is in recall what will the controller do? - ANS The controller will service that phase
even if there is no need for it.
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
