FIRE DETECTION IT TOO LATE

A transit fire detection system designed to identify risk before failure.

Integrated safety systems and fleet technologies for the people, vehicles, and facilities that keep communities moving.

THAT BUS DOESN’T HAVE TO BURN

Tridentâ„¢ combines continuous thermal monitoring, precise detection, escalating alerts, vehicle data, and coordinated bus fire suppression within one connected platform.

Instead of waiting for smoke, flame, or a conventional threshold alarm, Trident helps agencies identify abnormal conditions closer to their source and respond before the situation becomes more difficult to control.

  • Continuous thermal and optical monitoring

  • Location-specific detection of developing conditions

  • Escalating alerts through cloud-based dashboards

  • Integration with vehicle data and operational systems

  • Coordinated suppression and configurable response protocols

  • Historical information for investigation and root-cause analysis

From reactive detection toward predictive fire intelligence

Traditional fire detection systems are designed to recognize an event once defined alarm conditions are reached. Trident takes a more proactive approach.

Trident continuously monitors thermal trends and system inputs for abnormal conditions that may indicate developing risk—giving transit agencies earlier visibility and more time to respond before conditions escalate.

Trident doesn't predict when a fire will occur. It provides the intelligence needed to recognize potential problems sooner.

Trident gives transit agencies earlier visibility into developing thermal events—providing more time to protect people, vehicles, facilities, and surrounding assets.

Trident explainer V22
WITHOUT TRIDENT STAGE 1
Anatomy of a bus fire.
How Trident changes response to thermal events.
A thermal event without Trident
BATTERY BOX NORMAL IDENTIFY NOTIFY NULLIFY STAGE 1 — THE CONDITION BEGINS
A thermal condition begins inside the battery box.
Without continuous thermal monitoring, the change can remain invisible to operators and maintenance teams.
Cause Stage 1 Stage 2 Stage 3 VEHICLE LOSS LIKELY TOTAL VEHICLE LOSS VEHICLE SAVED
Same cause. Different outcome.
WITHOUT TRIDENT
Thermal event progresses
unimpeded
  • Heat continues to build
  • The response window closes
  • Thermal runaway continues
  • Potential to spread to other vehicles or infrastructure
TOTAL LOSS
WITH TRIDENT
Thermal event is
interrupted at Stage 1.
  • Abnormal heat is identified
  • The right people are notified
  • Countermeasures deploy to mitigate the event
  • Potential for decreased loss of assets
VEHICLE SAVED

THE TRIDENT SYSTEM

Identify abnormal conditions earlier

Trident continuously evaluates thermal data against established operating parameters, identifying abnormal conditions in milliseconds rather than waiting for traditional alarm thresholds to be reached.

Notify the right people with the right information

Alerts increase in severity as conditions change, giving drivers, dispatchers, maintenance personnel, and safety teams timely, location-specific information through vehicle displays, cloud dashboards, email, SMS, or integrated fleet systems. This keeps every stakeholder in sync as a situation develops, from the driver in the seat to the safety team back at the depot.

Nullify the threat—or limit its impact

Trident can initiate configured countermeasures, including bus fire suppression, vehicle protocols, or asset-protection procedures based on the location and severity of the condition. When recovery isn't possible, earlier information still helps agencies isolate the vehicle and protect nearby buses, infrastructure, and personnel.

THE THERMAL PROBLEM

Legacy systems respond to an alarm. Trident helps agencies see the event developing.

Many conventional transit fire systems are designed to activate when a sensor reaches a predetermined threshold or evidence of combustion is already present.

That approach can leave agencies with little time to investigate, isolate the vehicle, protect adjacent assets, or initiate an orderly response.

Trident adds continuous thermal visibility and operational context, helping agencies:

  • Identify abnormal heat earlier

  • Locate the source of a developing condition

  • Distinguish isolated readings from sustained trends

  • Notify the appropriate personnel as severity changes

  • Initiate suppression or other configured protocols when required

  • Preserve the event history for investigation and analysis

Where batteries fail.

Battery thermal escalation, from optimal range (–14°F to 122°F) through pre-alarm (221°F), alarm (275°F), and venting (285°F).

Batteries run safely within a normal temperature range, but too much heat — from the environment or from the battery itself — can push them toward failure. As temperatures climb, warning signs appear, but by the time an alarm sounds, the battery may already be past the point of no return. Minutes later, it can vent gas and ignite.

The takeaway: waiting for an alarm means reacting to a failure already in motion. waiting for an alarm means reacting to a failure already in motion. Identifying abnormal heat earlier creates more time to investigate, intervene, and protect surrounding assets.

TRIDENT DASHBOARDS

See what matters without searching for it

Trident gives transit agencies a fleet-wide view of vehicle condition, active alerts, thermal trends, diagnostic information, and historical activity. Designed for desktop and mobile access, the dashboard helps safety, maintenance, operations, and management teams move from isolated alarms to a clearer operational picture.

Fleet health at a glance
Review vehicle status, current conditions, recent activity, and fleet-level performance from one central view.

Thermal trends over time
Compare current readings with historical activity to identify patterns, recurring conditions, and changes that warrant investigation.

Prioritized alerts
See active and escalating alerts in order of severity so the most urgent conditions receive attention first.

Vehicle-level detail
Examine the thermal profile, system condition, alert history, and available operational information for an individual vehicle.

Diagnostic context
Translate vehicle fault codes and recorded activity into information maintenance and safety teams can use.

TRIDENT BENEFITS

More time. Better information. Greater control.

Millisecond Detection

Trident evaluates incoming thermal data in milliseconds, identifying abnormal conditions as they develop rather than waiting for traditional alarm thresholds to be reached.

Earlier visibility

Identify developing thermal conditions before they become obvious through smoke, flame, or equipment failure.

More coordinated response

Give drivers, dispatchers, maintenance teams, and safety personnel access to clearer and more timely information.

Better protection for surrounding assets

Help agencies isolate a developing event and reduce exposure to nearby vehicles, charging equipment, buildings, and maintenance facilities.

Stronger incident reconstruction

Preserve thermal, alert, diagnostic, and operational information for root-cause analysis, insurance review, training, and legal investigation.

Improved fleet planning

Use recorded trends and event history to inform maintenance priorities, vehicle specifications, operational procedures, and future procurements.

Electric bus fire safety requires earlier visibility.

Battery-electric buses introduce high-voltage components, battery enclosures, charging systems, and thermal conditions that may behave differently from conventional vehicle systems. When a developing event is not identified early, agencies may have limited options beyond isolating the vehicle, evacuating the area, and protecting surrounding assets.

Trident is designed to give agencies more time and information by:

  • Monitoring thermal conditions continuously

  • Identifying unusual temperature patterns

  • Locating developing conditions more precisely

  • Delivering alerts before major escalation

  • Supporting coordinated intervention and suppression

  • Preserving data for investigation and future prevention

APPLIED THERMAL SCIENCES

Help shape the next generation of electric bus fire safety.

Troman is working with forward-thinking transit agencies to test and evaluate Trident technologies under controlled and real-world conditions.

Participating organizations may contribute to:

  • Controlled evaluation of vehicles, battery enclosures, and components

  • Testing of thermal, gas, optical, and linear heat detection

  • Development of industry thermal baselines

  • Evaluation of alerts, dashboards, and fleet integrations

  • Validation of suppression and countermeasure strategies

  • Advancement of electric bus fire safety research

Frequently asked questions about the Tridentâ„¢