Laser Rail Inspection System (LRAIL)

Pavemetrics Laser Rail Inspection System (LRAIL) delivers an entirely new and more cost effective means to inspect railway assets.

Most rail inspection sensors in the marketplace today are limited to a single function; they measure a specific parameter such as gage, or perform a single task, such as imaging.

The LRAIL delivers greater ROI by combining high-resolution rail imaging with 3D scanning in a single pass and automating the inspection process. So not only can you see your railway in high-resolution, but you can inspect it too.

The LRAIL captures an impressive 1 mm resolution X and Y 3D profile with a vertical accuracy 0.1 mm of the rails, ties and ballast area at speeds up 60 km/h at 1mm intervals, 120 km/h at 2mm intervals and 180 km/h at 3mm intervals.

The LRAIL’s automated algorithms analyze 3D profiles to make key measurements such as rail geometry (cant, alignment, curvature, etc.) and to detect key defects (rail surface flaws and damaged ties).

The Right Data; According to the Right Standards

Key automated measurement capabilities include: gage, cant, curvature, alignment, tie detection, joint detection, rail surface defect detection and more.

The Most Widely Trusted Sensor

The LRAIL leverages Pavemetrics prolific LCMS technology; with more than 100 units in use around the world, the LCMS is hands-down the most widely adopted and trusted sensor of its kind.

Objective, Accurate and More Repeatable

Data quality is also improved as the process is fully computer-driven and objective, with results being just as accurate, and much more repeatable, than manual rating.

Higher ROI than Traditional Technologies

By capturing images and 3D profiles all in the same pass, and by offering automated data processing, the LRAIL can easily replace multiple legacy measurement systems. Saving you cost, weight and power.

See it in Action

Click on the movie below to see high resolution 3D scans from the LRAIL.

Key Features

  • Inspection at speeds up to 180 km/h
  • Simultaneous 3D geometry measurement and high-resolution Imaging
  • Daytime and night-time operation, immunity to shadows
  • Fully automated railway inspection:
    • Wooden tie rating (location, skew angle, cracking, splits, missing spikes)
    • Concrete tie rating (location, skew angle, crack length, crack depth, crack width)
    • Fastener inspection (location, type, miss-alignment, missing, covered)
    • Crossing inspection (location, TPOC, wear)
    • Switch inspection (location, toe detection, toe damage, foot detection)
    • Rail surface damage (chips, cracks)
    • Joint detection and gap measurement
    • Gauge width, cant/tilt of rails, cross-level between rails, longitudinal level
    • Railhead 3D profile and wear
  • Data are automatically location-referenced using mile-point and inertially corrected GPS (x, y and z)
  • Compact; sensors weigh only 13 kg each and can be mounted on a high-rail vehicle or a dedicated inspection car
  • Rugged components mounted in environmentally-sealed enclosures
  • Low-power consumption
  • Data compression algorithms to minimize storage


  • 28,000 Hz scanning frequency
  • 60 km/h at 1mm intervals, 120 km/h at 2mm intervals and 180 km/h at 3mm intervals
  • 1 mm transverse resolution
  • 0.1 mm vertical resolution
  • 0.25 mm vertical accuracy