GapGUARD

Switch Alignment & Gap Status

GapGUARD strengthens switch safety by improving awareness of switch alignment and point-gap conditions before a move proceeds. With two-way confirmation — yard-side indication plus YardGUARD in-cab status and automated emergency braking, gives teams clearer confirmation at a high-consequence decision point.

Part of YardGUARD’s real-time safety intelligence system – helping teams verify conditions and proceed with confidence.

Talk to a YardGUARD Specialist  Watch How it Works

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What It Does

Helps teams confirm switch alignment/gap status before committing to a move.

Key Benefits

  • Clear go/no-go decisions at switches
  • Reinforced move-by-move operating discipline
  • Reduced derailment risk and disruption tied to misalignment events

See how GapGUARD integrates with YardGUARD across the railyard

Download the YardGUARD brochure

How It Works

  • Yard-side indication provides on-site status in the switch zone
  • Switch status is shown on the YardGUARD in-cab display for confirmation
  • Designed to support repeatable checks before a move proceeds

What the Team Sees

In the yard:
Light indicating switch alignment and gap conditions

In the cab:
Switch status on the YardGUARD display

Technical Details 

  • Advanced sensors detect switch alignment and switch gaps
  • Mounted directional signal light
  • High-intensity LED lights
  • Low-maintenance design and long-life LED bulbs
  • All-weather construction
  • Flexible power options: solar or hardwired
A rail yard with tracks splitting into multiple directions, several train cars, a signal post with solar panel, and industrial buildings in the background on a foggy day.
Infographic showing five Yard Guard safety systems: Stop Guard, Watch Guard, Crossing Guard, Gap Guard, Derail Guard, and Foul Guard, by Marmon Rail Technologies.

YardGUARD — Safety Intelligence for the Yard

YardGUARD is Railserve’s integrated railyard safety system — built from six interconnected components that work together across critical zones.

Learn about YardGUARD

A railway crossing with barriers, warning lights, a train, and a solar-powered device on a trailer; "Crossing GUARD" logo is displayed at the bottom.

CrossingGUARD

High-visibility control that keeps yard crossings coordinated and safe.

A nighttime rail yard scene shows several freight cars on tracks with derail devices and indicator lights; "DerailGUARD" logo is displayed at the bottom.

DerailGUARD

Multi-layered confirmation of derail status with activation of emergency braking as needed.

A rail safety device is installed at a track switch near warning signs, with mountains and a road in the background. "FoulGUARD™" is displayed in a blue banner at the bottom.

FoulGUARD

Foul-zone clearance visibility that reinforces operating discipline and helps prevent sideswipes.

A rail worker in safety gear stands near train cars on tracks; the image includes the StopGUARD logo and branding at the bottom.

StopGUARD

Automated emergency braking and crew awareness support when seconds matter.

A freight train travels along railroad tracks at night with headlights on; the WatchGuard logo appears at the bottom of the image.

WatchGUARD

In-cab hazard and alignment monitoring that improves visibility and activates emergency braking as needed.

See YardGUARD in Action

Talk to an Expert  Download Brochure  See YardGUARD Demo