IMSA Traffic Signal Technician Level I & II| Questions and Verified Answers| Grade A| 100% Correct (2024/ 2025 Upsates BUNDLED TOGETHER WITH COMPLETE SOLUTIONS)

IMSA Traffic Signal Technician Level I & II| Questions and Verified Answers| Grade A| 100% Correct (2024/ 2025 Upsates BUNDLED TOGETHER WITH COMPLETE SOLUTIONS)

IMSA Traffic Signal Technician Level II
(New 2024/ 2025 Update) Questions and
Verified Answers| Grade A| 100% Correct
QUESTION
The reinforcing on a concrete strain pole is arranged to primarily withstands loads in how many
directions?
Answer:
One direction
QUESTION
The side of the pole that is to be turned toward the load is called?
Answer:
The load face
QUESTION
Overhead signs used in traffic signals are what two types?
Answer:
Regulatory signs
Street name signs
QUESTION
How are “blank-out” signs illuminated?
Answer:
Internally

QUESTION
When are blank-out signs only activated? (2)
Answer:
Specific times of day
Specific events
QUESTION
Several considerations must be made before actively engaging in work with a lift truck, these
include (5):
Answer:
Positioning if the vehicle in or adjacent to the roadway
Establishing a temporary traffic control zone
Verification of overhead conflicts
Planning the work to be performed
Using an approved safety harness
QUESTION
Bucket trucks may have a boom that is capable of rotating and extending which is called?
Answer:
Articulating boom
QUESTION
What are some disadvantages of an aerial platform lift?(4)
Answer:
Only extends vertically
Cannot reach as high as boom trucks
Must be parked on flat ground
Must be positioned directly below work area.

QUESTION
The primary purpose of the traffic signal monitor unit is to act as?
Answer:
Guard against system malfunction
QUESTION
If a malfunction is present the monitoring unit will automatically put the intersection into what
mode?
Answer:
Flashing condition
QUESTION
An intersection will remain in flash mode until the monitor unit is?
Answer:
Reset
QUESTION
The CMU and MMU checks the controller for what two things?
Answer:
Proper power
Timing functions
QUESTION
What will cause the monitor (CMU) to transfer the intersection into flash mode?(3)
Answer:
Loss of power to the controller

The 24 volt DC voltage of the controller is lost
Time it takes to change from one indication to another is incorrect
QUESTION
What does each conflict monitor have that is unique for that particular intersection
Answer:
Program card
QUESTION
What are short lengths of conductors on the program card called?
Answer:
Jumpers
QUESTION
On the program card jumpers are installed to tell the unit “what” are considered compatible?(2)
Answer:
Movements
Channels
QUESTION
For NEMA type controllers positions not having jumpers are considered as?
Answer:
Conflicts
QUESTION
Program cards for type 170 controllers use a “what” as a jumper to wire the positions which are
considered conflicts?
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IMSA Traffic Signal Technician Level 1 (New
2024/ 2025 Update) Questions and Verified
Answers| Grade A| 100% Correct
QUESTION
The two nominal diameter sizes for vehicular signal lenses are:
Answer:
8 in (200 mm) and 12 in (300 mm)
QUESTION
The purpose for “louvers” is to:
Answer:
Make signal visible from a specific lane
QUESTION
Which of the following types of conduit are used for traffic signals?
Answer:
Rigid Steel Conduit
High-Density Polyethylene (HDPE)
PVC Schedule 40
QUESTION
Traffic signal supports are NOT used to display the following items:
Answer:
Y: Guide signs
N: Advertisements

Y: Regulatory signs
Y: Overhead street sign names
QUESTION
Which of the following is a disadvantage of mast arms:
Answer:
Large foundations
QUESTION
Methods of signal supports include all of these except:
Answer:
N: Arched supports
Y: Truss supports
Y: Monotube supports
Y: Pedestal supports
QUESTION
Components of the optical unit for an incandescent lamp include all of the following except:
Answer:
Y: Lamp socket
N: Shade
Y: Lens
Y: Reflector
QUESTION
For pedestrian signals controlling crosswalks less than 100 feet, what is the required height of
the symbols themselves:
Answer:
At least 6 inches

QUESTION
Loop detectors operate on the principle of:
Answer:
Inductance
QUESTION
The piece of cable that connects the controller cabinet to the loops is called a:
Answer:
Lead-in cable
QUESTION
The outer jacket of loop lead-in cable is typically made of:
Answer:
Polyethylene
QUESTION
What is the advantage of video detection systems?
Answer:
Images can be sent to remote locations
QUESTION
Which of the following is a type of microwave detector?
Answer:
Frequency-modulated continuous wave (FMCW)
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Traffic Signal Technician Level 1 (New 2024/
2025 Update) Questions and Verified
Answers| Grade A| 100% Correct
QUESTION
Typical back-up battery systems provide battery power in case of an outage to a signal for:
Answer:
2 to 6 hours
QUESTION
A major distinguishing feature between NEMA TS-1 and TS-2 controllers is:
Answer:
Data bus
QUESTION
The advanced transportation controller was developed to provide:
Answer:
Open architecture hardware and software platform
QUESTION
Which of the following type of controller assemblies, without adapters, can accept multiple
software platforms and be utilized in all types fo cabinets:
Answer:
2070 controller

QUESTION
What is another term for load switches used in 170/2070 controllers?
Answer:
switch packs
QUESTION
Which type of controller was introduced to supersede the 170 controller?
Answer:
2070 controller
QUESTION
the NEMA TS-2 standards cover the same items as the TS-1 standards but expand the
requirements to include which of the following:
Answer:
Treatment fo signal preemption
QUESTION
What is NOT part of an underground power service:
Answer:
Conduit rise with weatherhead
QUESTION
Two common types of signal pole installations are
Answer:

Direct buried and foundation
QUESTION
The first type of testing performed on a controller cabinet assembly is
Answer:
bench test
QUESTION
the second type of test performed on a controller cabinet assembly is
Answer:
field test
QUESTION
continuity is a type of test for
Answer:
traffic signal conductors
QUESTION
the most labor intensive type of vehicle detection installation is
Answer:
inductive loop detection
QUESTION
which of the following ‘start-up’ items need to be completed by the contractor prior to the
physical construction of the traffic signal
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IMSA Traffic Signal Technician Level 1|
Questions and Verified Answers| Grade A|
100% Correct (2024/ 2025)
QUESTION
Traffic control signals are usually installed why ?
Answer:
Because a large volume of conflict in traffic makes it necessary to alternate the traffic
movements that are directed to stop and allowed to proceed
QUESTION
Traffic control signals are usually placed at locations where __ ?
Answer:
Where to public streets intersect with each other or where high value private driveways intersect
with a major street
QUESTION
How many legs does the signalized intersection have?
Answer:
Four legs (four-way intersections)
QUESTION
How many legs does a T intersection have?
Answer:
Three legs

QUESTION
Midblock pedestrian signal is placed where?
Answer:
At a marked crosswalk in the middle of a block or between two intersections where there is no
minor street or driveway ( School zones and heavy urbanized areas)
QUESTION
Midblock pedestrian signals usually have standard three section traffic signals facing the
vehicles on the street with the circular green indications displayed until a pedestrian interrupts
the controller operation by activating a pedestrian detector ? True or false ?
Answer:
True
QUESTION
A new option for mid block pedestrian signals ?
Answer:
“Pedestrian hybrid beacon” sometimes called high intensity actuated crosswalk or hawk
QUESTION
Emergency vehicle signals are usually located at where?
Answer:
At or near the exit of the fire station or other facility that houses emergency response vehicles
QUESTION
What is the size for emergency vehicle traffic control signals?
Answer:

12 inch diameter for sturdy red and steady yellow circular signal indications and any arrow
indications and 8 inch diameter for green or flashing yellow circular signal indications
QUESTION
When the pedestrian signal Head display a upright hand ( what does It symbolize?
Answer:
Don’t walk
QUESTION
When should the uprise hand( don’t walk) be displayed?
Answer:
When the pedestrian hybrid beacon Face either dark or displays Flashing or Steady yellow
QUESTION
When should the walking person symbol be displayed?
Answer:
When the pedestrian hybrid beacon faces are displayed Steady circular red signal
QUESTION
When should the pedestrian signal head display a flashing up rise hand?
Answer:
When the pedestrian hybrid beacon faces are displayed alternating flashing circular red signal
QUESTION
Upon pedestrian clearance the pedestrian signal head reverts to which display?

Answer:
Steady uprise hand
QUESTION
Upon activation by authorized emergency personnel the emergency vehicle hybrid beacon faces
shall display what?
Answer:
Should each display a flashing yellow signal indication followed by a steady yellow change
interval prior to displaying two circular read signal indicatates in alternating flashing array
QUESTION
When should the alternating flashing red signal indications be displayed in emergency vehicle
hybrid beacon?
Answer:
Only be displayed when it is required the drivers on the major streets stop and then proceed
subject to the rules applicable after making a stop sign
QUESTION
Upon termination of the flashing red signal The emergency vehicles hybrid beacons Shall revert
back to which mode?
Answer:
Too dark mode ( no indication display)
QUESTION
Emergency traffic Signals are ” preempted” (turned on) when?
Answer:
When the emergency vehicles need access to major street
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IMSA Traffic Signal Technician Level II |
Questions and Verified Answers| Grade A|
100% Correct (2024/ 2025)
QUESTION
Yello change interval does what?
Answer:
It alerts drivers that the green display has ended and that the right-of-way will be changing.
QUESTION
The “yellow change interval” must give a sufficient time to allow……… what?
Answer:
Allowed drivers approaching the intersection either to come to a safe stop before reaching the
stop line or to proceed into the intersection prior to the display of the rare indication.
QUESTION
How is a ” yellow change interval calculated?
Answer:
Typically based on the speed of approaching vehicles not the POSTED SPEED LIMIT!
QUESTION
“Red Clearance Interval” provides what?
Answer:
A brief period of time between the end of the yellow display on one approach and the start of the
green display on a conflicting approach
“Basically giving you time to drive to the other side of intersection.

QUESTION
Red clearance interval provides a brief period of time. How much time does it give you?
Answer:
1 to 3seconds
QUESTION
How is a red clearance interval calculated ?
Answer:
The distance from the stop line to a point that is clear of conflicting vehicles and pedestrians
QUESTION
A “pedestrian head “at a intersection gives the pedestrian what information?
Answer:
The time they need to safely cross the street
QUESTION
Pedestrian timings include both & _____ ?
Answer:
Walk interval and
Pedestrian change interval.
QUESTION
What is a “walk interval”?
Answer:

The amount of time that is given to the pedestrian that is using the crosswalk to get to the other
side of the crosswalk safely. ( it’s not related to the time needed to cross the stree)
QUESTION
The MUTCD recommends _ for the ” walk interval ” but allows the use of walk intervals as short of __ seconds?
Answer:
7 seconds and 4 seconds
QUESTION
During the ” walk interval” , the ” pedestrian signal head” displays what symbol?
Answer:
Steady walking person symbol during the walking interval.
QUESTION
” pedestrian clearance time” should be sufficient to allow a pedestrian crossing in the crosswalk
at the end of the WALKING PERSON symbol to travel at walking speed of ?
Answer:
3.5 feet per second
QUESTION
“Pedestrian clearance time” provides what?
Answer:
enough time for a pedestrian who just enter the crosswalk to reach a safe location at the other end
of the crosswalk before a green indication is displayed for other traffic.
QUESTION

A pedestrian change interval consisting steps are?
Answer:
1) UPRAISED HAND (symbolizing Don’t Walk ! ) signal indication shall begin immediately
following the WALKING PEROSN (symbolizing walk) signal indication. Following the
pedestrian change interval. Consisting of a (steady UPRAISED HAND) symbolizing don’t walk
signal indication shall be displayed for at least 3 second prior to the release of any coming traffic.
QUESTION
A ” buffer interval consisting of a ?
Answer:
Steady ( UPRAISED HAND ) symbolizing don’t walk!
QUESTION
The sum of the time of the and shall not be less than the calculated
“pedestrian clearance time”
Answer:
Pedestrian change interval and the buffer interval
QUESTION
“Buffer space ” steady ( UPRAISED hand) shall?
Answer:
not begin later than the beginning of the red clearance interval if used.
QUESTION
Minimum recall is?
Answer:
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Traffic Signal Technician Level II (New 2024/
2025 Update) Questions and Verified
Answers| Grade A| 100% Correct
QUESTION
Most electrical codes require how many ohms to ground for electrical service installations?
Answer:
25 ohms
QUESTION
Resistance of meters used to measure current are normally?
Answer:
very low
QUESTION
What does OTDR mean?
Answer:
optical time domain reflectometer
QUESTION
In what type of controller is the cycle sometimes called a “dial” because a rotating dial is used to
control the timing of the various signal displays?
Answer:
older electromechanical

QUESTION
List 2 things that describe the vehicle movement made at an intersection?
Answer:
direction of approach
manuever
QUESTION
In usual convention, how are through phases numbered?
Answer:
in a clockwise direction starting with phase 2
QUESTION
Some agencies refer to a combination of movements as a phase. This is also true in some older
controller assemblies that operate with what maximum amount of phases?
Answer:
4
QUESTION
When it comes to barriers for dual ring controllers there are _______ barriers, one for leaving
________ street and one for leaving ________ street
Answer:
2, major, minor
QUESTION
Is this true about an independent overlaps: An independent overlap follows a designated phase
Answer:

no
QUESTION
Parent/child overlaps are the most common type of overlap. The overlap is viewed as the
________ because it is only present when one or more phase is active, which is referred to as the
______
Answer:
child, parent
QUESTION
This left turn phase is defined as “both modes occur on an approach during the same cycle”?
Answer:
protected/permissive
QUESTION
The yellow-red flashing mode provides the same type of control as a 2 way stop control where
only the minor streets have a what?
Answer:
stop sign
QUESTION
In order to ensure fail safe operation , what occurs when a conflict monitor unit (CMU) detects a
fault?
Answer:
the flash transfer relays have all of the signals display red
QUESTION
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