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IMSA Traffic Signal Technician Level 1
(Latest 2025 / 2026 Update) Questions and
Answers | Grade A | 100% Correct (Verified
Elaborations)
Question:
What is the primary function of the IMSA?
Answer:
Safety education
Question:
IMSA stands for:
Answer:
International Municipal Signal Association
Question:
Which of the following is NOT an IMSA certification?
Answer:
Y: Traffic Signal Level II Design/Engineer Technician Y: Traffic Signal Level II Field Technician Y: Traffic Signal Level II Bench Technician
N: Traffic Signal Level III Bridge Design Technician
Question:
Which of the following are potential safety hazards?
Answer:
Overhead and underground power Gas Aerial lift equipment
Question:
What are the sections of a ramp meter signal?
Answer:
Circular red, circular green PPE stands for:
Answer:
Personal Protective Equipment
Question:
Which of the follow is an example of adequate fall protection during the operation of aerial lift equipment?
Answer:
Full body harness Safety belt
Answer:
2 and 6
Question:
The green interval is made up which three components?
Answer:
Minimum green, passage time, maximum green
Question:
What are the three types of recall features of a traffic signal controller?
Answer:
Minimum, maximum, pedestrian (+soft)
Question:
In a coordination plan, what is the number of seconds given to each phase at the intersection?
Answer:
Split (g,y,r)
Question:
Which of the following traffic signal coordination method is typically least expensive?
Answer:
Time-based coordination
Question:
Which of the following is a definition of cycle length:
Answer:
The elapsed time between the start of a specific display until that display comes up again
Question:
Which of the following is a characteristic of sequential phases:
Answer:
They cannot occur at the same time
Question:
Which of the following is a definition for initial green time:
Answer:
Minimum time that the green indication must be displayed
Question:
The only point in the cycle of a coordinated traffic signal controller where the major-street phase is allowed to end is called:
Answer:
Yield point
Question:
Which of the following is NOT a common mode of operation for timing plans in a signal system:
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:
Question:
A 6' X 60' loop typically has how many turns of wire:
Answer:
Two
Question:
The primary function of the CMU is:
Answer:
Prevent conflicting signal indications
Question:
What is NOT part of the overhead power service:
Answer:
N: Pull box or boxes Y: Power supply wires Y: Conduit riser with weatherhead Y: Meter housing
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 of 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 intended to supersede the 170 controller?
Answer:
bench test
Question:
Continuity is a type of test for:
Answer:
Traffic signal conductors
Question:
The most labor intensive type of vehicle detection installed 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:
Answer:
Utilities notification and coordination Public awareness as required by the agency Approval of traffic control plan
Question:
Which of the following equipment is NOT typically seen at the construction site of a traffic signal:
Answer:
Y: Horizontal boring machine for conduit under pavement Y: Aerial lift truck for above ground work N: Grader to create level intersections Y: Trencher for cable installation
Question:
"Free-swinging" signal heads are located on which of the following support systems:
Answer:
Span wires
Question:
Traffic signals can be installed:
Answer:
After justification is determined through a warrant study
Question:
A traffic signal warrant study can determine the need of installation through all of the following except:
Answer:
Y: Traffic volumes that show insufficient gaps exist on the major street to allow minor street traffic to enter or cross an intersection N: Road users at an intersection submitting a sufficient number of requests for installation of a signal based on local requirements Y: Pedestrian volumes indicate a need in order to allow safe crossing of a roadway.
Question:
Which of the following does a traffic signal designer have to take into consideration when designing a signal?
Answer:
Signal phasing Utilities Cost
Question:
Which of the following are considerations that should be taken into account when designing a new traffic signal?
Answer:
Types of preemption required Coordination with nearby traffic signals Traffic characteristics at the location
Question:
Multimeters are used to check:
Answer:
Resistance Voltage Current
Question:
What device is used to measure the resistance or breakdown strength of conductor insulation:
Answer:
Megohmmeter
Question:
What device does a technician use to troubleshoot existing loops already installed in the field:
Answer:
Loop analyzer
Question:
Resistance as expressed by Ohm's law is:
Answer:
R = E/I
Question:
Ohm's law is useful in the design and troubleshooting of circuits and describes the mathematical relationship of the following:
Answer:
Voltage Current Resistance
Question:
Y: Weather related issues Y: Ventilation N: Lubrication
Question:
A key component of documentation is:
Answer:
- Developing written procedures for documentation
- Developing checklists
- Developing field reports
Question:
Which of the following is a characteristic of a good field report:
Answer:
Concise Describes actions taken Clearly written
Question:
Which of the following best describes traffic signal maintenance:
Answer:
The repair or upkeep of the existing equipment and operations
Question:
Checking for inconsistent indications, local construction activities, and if the signal is in flashing mode would be an example of which of the four steps in the troubleshooting procedure:
Answer:
Observe
Question:
Crashes occur at signalized intersections due to:
Answer:
Driver error Vehicle equipment malfunction Roadway or traffic control device defects
Question:
The best way to minimize the possibility of being named in a lawsuit is by:
Answer:
Keeping good records Strict adherence to established standards Providing comprehensive maintenance procedures
Question:
Negligence is defined as:
Answer:
The failure to do something that a reasonable person would ordinarily do
