CF ChatterFix
Line Equipment

Traffic Signal Controller Maintenance

A device the public obeys without question, which makes its silent failures the ones that matter. The conflict monitor is what guarantees the intersection cannot show conflicting greens, and nothing indicates when it has failed. Detection faults are subtler still: an approach that is never served teaches drivers to run the signal.

Tracked Components 4
Scheduled PMs 4
Industries Municipal & Public Works

Components To Track

ChatterFix builds these as child assets under traffic signal controller, so failure history and PM completions attach to the component that actually failed — not just to the machine.

How Traffic Signal Controller Actually Fails

The failure modes worth designing a maintenance schedule around — in rough order of what they cost when they happen.

  • Conflict monitor failure — the protection against conflicting greens, with no indication
  • Detection loop failure, so an approach is never served and drivers learn to run it
  • Battery backup with no real runtime despite reading correct voltage
  • Water ingress and corrosion in the cabinet causing intermittent faults
  • Signal head misalignment and lens degradation reducing visibility

What To Measure

Recording that a PM was "done" tells you nothing next quarter. These are the readings that let you see a failure coming — and the reason ChatterFix captures measurements against the asset rather than just completions.

  • Conflict monitor tested at every visit, with the failsafe-to-flash proven
  • Battery backup load-tested for runtime, not voltage-checked
  • Every approach and pedestrian button actually actuated during inspection
  • Cabinet interior for water, corrosion and grounding integrity
  • Timing plan compared against the approved plan on file

Spares Worth Stocking

The parts whose absence turns a short repair into a long outage.

Preventive Maintenance Schedule

The PMs ChatterFix schedules against this equipment, with intervals and time estimates.

Common Questions

What maintenance does traffic signal controller need?
ChatterFix schedules 4 routines against this asset: battery charger & bank maintenance (quarterly), hot runner controller service (quarterly), traffic signal inspection (semi-annual), work zone & traffic control setup (monthly). The readings that matter most are conflict monitor tested at every visit, with the failsafe-to-flash proven.
How does traffic signal controller usually fail?
The most common modes are: conflict monitor failure — the protection against conflicting greens, with no indication; detection loop failure, so an approach is never served and drivers learn to run it; battery backup with no real runtime despite reading correct voltage; water ingress and corrosion in the cabinet causing intermittent faults; signal head misalignment and lens degradation reducing visibility. Most of these degrade gradually rather than failing outright, which is what makes interval-based inspection worthwhile.
What spare parts should we stock?
LED signal modules, Backup batteries, Detection amplifiers, Conflict monitors, Cabinet filters and seals, Pedestrian push buttons. The test is lead time, not cost: stock the part whose absence turns a two-hour repair into a two-week outage, even if it is cheap.
Can I track this in ChatterFix?
Yes. Pick your industry at signup and traffic signal controller is created as an asset with its 4 tracked components, with its PM schedule already attached. Technicians then log readings and findings against it by voice rather than typing them in.

Where It Fits

Get Traffic Signal Controller Into A Real CMMS

ChatterFix builds this asset, its components, and its PM schedule automatically when you pick your industry — then your technicians update it by talking, not typing.