IMSA LEVEL 1 SIGNAL TECHNICIAN
CERTIFICATION EXAM 2025-2026| ACTUAL
TEST QUESTIONS WITH STUDY PACK
Where are you when you install alternating flashing 12" red lights?
At a railroad crossing.
Who determins the the standards on traffic control devices and sets the
requirements for uniformity?
The Manual on uniform traffic control devices, (MUTCD).
What is the the voltage that a traffic signal cabinet needs to run all its components?
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?
A ramp meter on a ramp to a highway.
,What is a flashing signal along the road called?
A flashing beacon.
What is the definition of short term work zone as per the MUTCD?
1 hour or less
What's OSHA?
Occupational and safety health administration
Can you get your level III certification and what are they?
Yes, and it's for bench and field electrician
I'm working near power lines where would I get my clearance from?
CEC, NEC, NESC
What are the three basic types of beacons?
Stop sign beacon, warning beacon, and flashing beacon.
,What is the difference between concurrent and sequential phases?
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?
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?
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?
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?
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
Phases 2,6 are called Main Street, and 4,8 are called side street.
Name the three traffic signal systems?
Closed loop, central computer, hybrid systems.
If phase 2 is in recall what will the controller do?
The controller will service that phase even if there is no need for it.
What happens after the green interval and before the red interval, and how is this
change interval figured?
Yellow interval, and is figured by using the approach speed of the traffic.
What is an offset?
The time it takes from the start of the green interval in a coordination timed
intersection and a system reference point along side the road.
CERTIFICATION EXAM 2025-2026| ACTUAL
TEST QUESTIONS WITH STUDY PACK
Where are you when you install alternating flashing 12" red lights?
At a railroad crossing.
Who determins the the standards on traffic control devices and sets the
requirements for uniformity?
The Manual on uniform traffic control devices, (MUTCD).
What is the the voltage that a traffic signal cabinet needs to run all its components?
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?
A ramp meter on a ramp to a highway.
,What is a flashing signal along the road called?
A flashing beacon.
What is the definition of short term work zone as per the MUTCD?
1 hour or less
What's OSHA?
Occupational and safety health administration
Can you get your level III certification and what are they?
Yes, and it's for bench and field electrician
I'm working near power lines where would I get my clearance from?
CEC, NEC, NESC
What are the three basic types of beacons?
Stop sign beacon, warning beacon, and flashing beacon.
,What is the difference between concurrent and sequential phases?
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?
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?
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?
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?
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
Phases 2,6 are called Main Street, and 4,8 are called side street.
Name the three traffic signal systems?
Closed loop, central computer, hybrid systems.
If phase 2 is in recall what will the controller do?
The controller will service that phase even if there is no need for it.
What happens after the green interval and before the red interval, and how is this
change interval figured?
Yellow interval, and is figured by using the approach speed of the traffic.
What is an offset?
The time it takes from the start of the green interval in a coordination timed
intersection and a system reference point along side the road.
