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Falling Object Detection is an advanced track obstacle detection system designed to protect high-speed and conventional rail corridors from objects dropped or dislodged from bridges and overpasses.

Bridge and Overpass Track Obstacle Detection

By directly monitoring the track under structures and immediately alerting operators, the system helps prevent collisions, reduce unnecessary slow orders, and accelerate return-to-service decisions with verified information. 

Falling Object Detection Resources

How Does Falling Object Detection Work?

Falling Object Detection uses direct track monitoring to determine whether an object is present within the operationally critical clearance zone under bridges and overpasses. The system is designed to support multiple operational workflows, from automatic alarm outputs to operator verification, without relying on indirect "trip-only" mechanisms.

Falling Obstacle Detector layout graphic showing the detection zone.

Core principle: detect what matters operationally - an obstacle on or near the rail that can endanger train movement, then provide actionable outputs.

Typical workflow:

  1. Continuous monitoring under/near the structure to detect objects that encroach into the defined hazard zone.

  2. Immediate local alarm generation via relay output when an obstacle is detected.

  3. Web alert with notification to need to know party to follow, including visual confirmation via integrated camera views to support operator decision-making.

  4. Event logging and reporting to support post-event analysis, reliability tracking, and maintenance planning.

Key Features and Benefits

Direct Track Monitoring Where the Risk is Highest

Bridge and overpass locations concentrate risk: even a small object can become a high-energy hazard at speed. Falling Object Detection is purpose-built to monitor these hotspots and confirm whether the track is obstructed.

Faster, More Confident Operational Decisions

  • Immediate notification of potential obstruction events

  • Visual verification using integrated camera systems to support decision-making and reduce unnecessary extended restrictions

  • Actionable event details (timestamped alarms, unit identification, configurable event fields) to support operations and incident response

Reduced Disruption from "Unknown Condition" Events

Instead of defaulting to prolonged slow orders or repeated site visits, operators can use validated alarms and visual evidence to triage response:

  • Dispatch only when there is evidence of an obstacle

  • Clear the location faster when conditions are verified

Integration-Ready for Railway Control Environments

Falling Object Detection is designed as a subsystem that fits into rail operating rules and control architectures:

  • Relay outputs for simplified signal/control integration

  • Interfaces for central monitoring and alarm distribution (control center and maintenance notifications)

  • Designed for robust communications and operational resilience

Built for Harsh Wayside Environments

  • Ruggedized trackside equipment for weather, vibration, and debris exposure

  • Reliable DC power architecture with straightforward battery backup options

Contact Us
  • L.B. Foster
  • Dublin, OH
  • L.B. Foster, 4393 Tuller Road, Suite K, Dublin, OH, 43017, United States
Office Hours:
Monday-Friday: 9-5 EST

Ordering and More Information

Contact a local representative today.

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