What capability distinguishes a NEMA TS 2 malfunction management unit from an older parallel-input conflict monitor?
Malfunction Management Units
Question · Easy
Mast arm versus span wire support
Signal Types & Field Devices
Flashcard
In a coordinated signal system, what does the term 'offset' refer to?
Coordination And Offsets
Question · Medium
The right-of-way, yellow change, and red clearance intervals in a cycle assigned to an independent traffic movement or combination of movements.
Signal timing
Guess the Term
Chapter 1: Worksite Safety and Maintenance of Traffic
1.1 Electrical Safety, PPE, and Lockout/Tagout at Signal Cabinets
Study guide
Cheat sheet
What type of controller operation uses detectors to extend green time based on real-time demand?
Actuated Signal Timing
Read the clue and guess the term in 6 tries.
Game
HAWK beacon purpose
What communication protocol is used in NEMA TS 2 cabinets for data exchange between the controller and cabinet components?
Communication Protocols
___ length: the time required for one complete sequence of signal indications.
When programming a coordinated signal plan, what three parameters must be set for each intersection?
RRFB purpose
What is the Bus Interface Unit (BIU) in a TS 2 traffic signal cabinet?
___ interval: the period when the person-on-foot symbol is displayed.
1.2 Maintenance of Traffic and Work-Site Protection
What is the purpose of an actuated-coordinated mode of signal operation?
Question · Hard
Swap tiles to line up three of the same term.
Term Match
Signal-head aiming
What condition does the MMU 'red fail' monitoring check for?
Mode in which a signal indication stays on continuously for an interval, a phase, or consecutive phases.
What is a time-space diagram used for in traffic signal coordination?
Pedestrian push button: basic role
When troubleshooting a signal that is stuck in flash mode, what should be checked first?
Troubleshooting Procedures
Device in a NEMA TS 2 cabinet that checks signal displays for conflicting indications and improper voltages.
Cabinet equipment
Chapter 2: Traffic Signal Standards and Equipment Operation
2.1 MUTCD Part 4 Standards for Signal Displays and Operation
What is the purpose of detector delay settings on a loop detector amplifier?
Advanced Detection
Flip two cards at a time to find matching terms.
Term Pairs
Signal hardware inspection focus
What is the function of the 'force-off' in a coordinated signal plan?
Cabinet module that converts the high-speed serial channel to the format the cabinet's rear panel needs.
Which medium is a traditional hardwired interconnect for closely spaced traffic signals?
Signal Interconnect Systems
Raceway purpose
Installation & Infrastructure
In coordinated signal timing, what is a yield point?
High-speed serial protocol on the Port 1 channel that runs at 153,600 bits per second with error checking.
2.2 NEMA TS 1 vs NEMA TS 2 Standards
Which feature helps make a pedestrian pushbutton accessible?
Ada Compliance
Find five hidden terms in a grid of letters.
Term Search
Pull box function
A video detection camera is producing intermittent false calls during nighttime operation. What is the most likely cause?
Controller ___: the part of a controller assembly that selects and times the displays of signal indications.
What is the purpose of a UPS (Uninterruptible Power Supply) system at a traffic signal installation?
Ups Systems
Why protect conductors during a pull?
When communication between a central or master system and a local controller is lost, what determines the local response?
___ arm: a horizontal support rigidly attached to a vertical pole that carries overhead signal faces.
Signal hardware
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