Traffic Signal Systems & Field Operations Mastery Exam: OSHA/CCOHS PPE
Compliance, NTCIP Protocols, Temporary Traffic Control, NEMA TS-1/TS-2
Controllers, RS-485 Bus Interface, ATC Open Architecture, Malfunction
Monitoring Units, Conflict Monitors, Flash Transfer Relays, Traffic Signal
Coordination, Offset & Split Timings, Volume-Density Signal Timing, Gap
Reduction, Yellow Interval Calculation, DC Power Systems, Series Circuits, TRIAC
Switching, Diodes & Transistors, SCRs, LED Components, Optical Time Domain
Reflectometry (OTDR), Electromechanical Controllers, Protected/Permissive Left
Turns, Parent/Child Overlaps, Mercury Contactor Disposal, Emergency Generator
Systems, Pedestrian Push Button Isolation, Aerial Lift Safety, Articulating &
Telescopic Booms, Mast Arm Signal Mounting, Traffic Signal Phase Sequencing,
and Force-Off Termination Exam Questions Verified and Provided with
Complete A+ Graded Rationales Latest Updated 2026
What organization has established requirements for PPE in certain working situations?
OSHA/CCOHS
Which of the following certifications must be attained first?
Traffic signal Tech. Level 1
Upgrades or revisions to the traffic signal are the responsibility of whom?
professional engineer
,What is NOT an example of documentation that can limit the liability of the technician and/or
agency?
NTCIP
What is the single most important focus that the field technician should have?
safety
For many agencies, what is the least amount of technicians required to perform work with an
aerial lift?
2
What is NOT true when it comes to dealing with the public?
If you are unsure of the answer, give them the incorrect information so you can keep working
What is NOT a function of a modern traffic signal controller?
Processing when a vehicle has run a red light and informing the police
What was a major drawback with the first traffic signal controllers?
Maintaining the mechanical parts
When did standardization of controllers become established in the United States and Canada?
,1970s
What was limited by the fourth proprietary connector used with the NEMA TS-1?
the type of replacement model
Which type of controller utilizes a high speed data channel between all major equipment to
maximize the functionality and expandability of the controller assembly?
NEMA TS-2 Type 1
What greatly reduced wire connections in the controller cabinet with the use of the RS-485 with
the SDLC?
Bus interface unit
What was the intent of developing the ATC specifications?
To have an open architecture hardware and software platform for ITS application
Which agency developed a communications protocol for ITS systems, field devices and software
so basic functionality should be interchangeable regardless of the manufacturer?
NTCIP
, Before beginning work that requires workers or vehicles to be in or over the roadway, what
should traffic signal field technicians ensure is in place?
Temporary traffic control (TTC)
What is NOT a common type of truck used for traffic signal maintenance?
dump truck
Traffic signals can be attached to Mast Arms using which of the following?
- disconnect hangers attached to the mast arm which suspend the signal
- bracket that is rigidly mounted to the mast arm with a clamping device
- pipe mounts that screw into nipples installed directly into the mast arm
- ALL of the above
all of the above
Traffic signal supports are NOT used to display the following items:
advertisements
Methods of signal supports include what?
Truss supports, monotube supports, pedestal supports
What is NOT an advantage of attaching signals to mast arms with brackets?
Compliance, NTCIP Protocols, Temporary Traffic Control, NEMA TS-1/TS-2
Controllers, RS-485 Bus Interface, ATC Open Architecture, Malfunction
Monitoring Units, Conflict Monitors, Flash Transfer Relays, Traffic Signal
Coordination, Offset & Split Timings, Volume-Density Signal Timing, Gap
Reduction, Yellow Interval Calculation, DC Power Systems, Series Circuits, TRIAC
Switching, Diodes & Transistors, SCRs, LED Components, Optical Time Domain
Reflectometry (OTDR), Electromechanical Controllers, Protected/Permissive Left
Turns, Parent/Child Overlaps, Mercury Contactor Disposal, Emergency Generator
Systems, Pedestrian Push Button Isolation, Aerial Lift Safety, Articulating &
Telescopic Booms, Mast Arm Signal Mounting, Traffic Signal Phase Sequencing,
and Force-Off Termination Exam Questions Verified and Provided with
Complete A+ Graded Rationales Latest Updated 2026
What organization has established requirements for PPE in certain working situations?
OSHA/CCOHS
Which of the following certifications must be attained first?
Traffic signal Tech. Level 1
Upgrades or revisions to the traffic signal are the responsibility of whom?
professional engineer
,What is NOT an example of documentation that can limit the liability of the technician and/or
agency?
NTCIP
What is the single most important focus that the field technician should have?
safety
For many agencies, what is the least amount of technicians required to perform work with an
aerial lift?
2
What is NOT true when it comes to dealing with the public?
If you are unsure of the answer, give them the incorrect information so you can keep working
What is NOT a function of a modern traffic signal controller?
Processing when a vehicle has run a red light and informing the police
What was a major drawback with the first traffic signal controllers?
Maintaining the mechanical parts
When did standardization of controllers become established in the United States and Canada?
,1970s
What was limited by the fourth proprietary connector used with the NEMA TS-1?
the type of replacement model
Which type of controller utilizes a high speed data channel between all major equipment to
maximize the functionality and expandability of the controller assembly?
NEMA TS-2 Type 1
What greatly reduced wire connections in the controller cabinet with the use of the RS-485 with
the SDLC?
Bus interface unit
What was the intent of developing the ATC specifications?
To have an open architecture hardware and software platform for ITS application
Which agency developed a communications protocol for ITS systems, field devices and software
so basic functionality should be interchangeable regardless of the manufacturer?
NTCIP
, Before beginning work that requires workers or vehicles to be in or over the roadway, what
should traffic signal field technicians ensure is in place?
Temporary traffic control (TTC)
What is NOT a common type of truck used for traffic signal maintenance?
dump truck
Traffic signals can be attached to Mast Arms using which of the following?
- disconnect hangers attached to the mast arm which suspend the signal
- bracket that is rigidly mounted to the mast arm with a clamping device
- pipe mounts that screw into nipples installed directly into the mast arm
- ALL of the above
all of the above
Traffic signal supports are NOT used to display the following items:
advertisements
Methods of signal supports include what?
Truss supports, monotube supports, pedestal supports
What is NOT an advantage of attaching signals to mast arms with brackets?
