Overhead Clearance Measurement for Bridges, Wires & Structures

MeasurePRO measures the real, current clearance under every bridge, wire, signal, and sign structure along a route — with ±2 mm LiDAR accuracy and photographic proof for each reading.

Why posted clearances aren't enough

Posted bridge heights are often rounded down, outdated after resurfacing, or missing entirely for utility wires, temporary structures, and vegetation. A bridge strike or wire snag caused by trusting a stale number can mean six-figure damage, downed power lines, and revoked permits. The only defensible answer is a fresh measurement of the actual structure — at every point across the travel lanes, not just the lowest posted figure.

MeasurePRO captures the full underside profile of each obstruction as the survey vehicle passes at traffic speed, so you know the clearance in your lane, at your load's offset — not just a single number on a sign.

That current field evidence supports route reconnaissance for OS/OW heavy haul, abnormal loads and exceptional transport, as well as corridor assessment for project cargo and out-of-gauge (OOG) units. Terminology changes across borders; the need to verify the actual travel envelope does not.

What gets measured

  • Bridge and overpass undersides, including skewed and arched profiles
  • Power, telecom, and catenary wires — including sag between poles
  • Traffic signals, sign gantries, and overhead cantilever structures
  • Tunnel portals and covered sections
  • Tree canopy and other soft obstructions along the corridor

Each reading is stamped with dual-GPS position and a synchronized camera frame. Questionable readings can be re-measured on the spot instead of requiring a second trip.

Defensible clearance records

Clearance data syncs to RoadScope for analysis against planned load heights, producing reports that stand up in permit applications and clearance disputes. Overhead clearance measurement is the core of every LiDAR route survey and drives heavy-haul route decisions and wind turbine transport planning. Learn about the measurement hardware or walk through a sample survey.

Apply this workflow to abnormal-load routes, port-to-site project cargo, mining access and energy-project corridors.

See MeasurePRO on a route you actually run

Book a live road demonstration, or walk through an example survey first — no account required.