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IMSA Traffic Signal Technician Level I Test
| Questions and Verified Answers | Grade A |
100 out of 100 (Latest 2025 / 2026 Update)
Question:
Where are you when you install alternating flashing 12" red lights?
Answer:
At a railroad crossing.
Question:
Who determins the the standards on traffic control devices and sets the requirements for uniformity?
Answer:
The Manual on uniform traffic control devices, (MUTCD).
Question:
What is the the voltage that a traffic signal cabinet needs to run all its components?
Answer:
120 volts AC
Question:
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?
Answer:
A ramp meter on a ramp to a highway.
Question:
What is a flashing signal along the road called?
Answer:
A flashing beacon.
Question:
What is the definition of short term work zone as per the MUTCD?
Answer:
1 hour or less
Question:
What's OSHA?
Answer:
Occupational and safety health administration
Question:
Can you get your level III certification and what are they?
Answer:
Yes, and it's for bench and field electrician
What is the cheapest way to coordinate a corridor of signals? What needs to stay the same throughout the day?
Answer:
Time based coordination, and cycle length.
Question:
Explain the white walking man, the flashing orange hand on a ped head and how is this time figured?
Answer:
The white walking man is the ped head walk interval, and the ped change clearance interval is the flashing orange hand.
Question:
What makes up the green interval?
Answer:
Initial green time, passage/extension/gap time, and max green time.
Question:
At most intersections what are phases 2,6 called, and phases 4,8 called
Answer:
Phases 2,6 are called Main Street, and 4,8 are called side street.
Question:
Name the three traffic signal systems?
Answer:
Closed loop, central computer, hybrid systems.
Question:
If phase 2 is in recall what will the controller do?
Answer:
The controller will service that phase even if there is no need for it.
Question:
What happens after the green interval and before the red interval, and how is this change interval figured?
Answer:
Yellow interval, and is figured by using the approach speed of the traffic.
Question:
What is an offset?
Answer:
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.
Question:
The controller in a coordinated plan has a call on the side street what can it do to service that call?
Answer:
Question:
The a.d.a of 1990 ensures no discrimination against people who have disabilities?
Answer:
True.
Question:
Are pull/ junction boxes only used where wire needs to change direction?
Answer:
No
Question:
What is used to shade signal indications from the sun and allow it be seen from the lane intended?
Answer:
Visors.
Question:
Signal heads that are _________ are to only be seen from a specific area on the road?
Answer:
Visibility limited.
Question:
____ assemblies provide the maximum support length to cross over a street?
Answer:
Truss type assemblies.
Question:
You can use the same type signal head _______ on a mast arm and truss supports?
Answer:
Mounting hardware.
Question:
Long life and low power consumption is a major advantage for _____ lamps?
Answer:
LEDs
Question:
The ___ wire keeps signal heads from swinging in the wind?
Answer:
tether
Question:
Span conductor wires are exposed to the weather 24/7? T or f?
Answer:
True
Question:
There are __ (Two or three) turns of wire in a standard loop that is 6' x 20'
Answer:
Three
Question:
Would a solar detector be a common way to detect for traffic at a traffic signal? Yes or no?
Answer:
No
Question:
List three ways Doppler microwave detectors can check for vehicles?
Answer:
Volume, occupancy, classification
Question:
For one to maintence_____ you must close the lane of travel.
Answer:
Loop detectors
Question:
A loop detector that is made up of two long rectangles right next to each other is called a ___?
Answer:
Quadrupole loop
Question:
If I ask for some #10 AWG wire, what does AWG stand for?
Answer:
American Wire Gauge
