High-accuracy rail infrastructure surveys

13 Aug 2025

A train station where UTEC were contracted to complete 12 surveys of footbridges and platforms for Mott MacDonald.

Project overview

Project name

Rail infrastructure surveys

Location

Scotland

Developer partners

Mott McDonald

Work scope

12 footbridges and 3 platforms

Solution

Laser scanning and gauging

Mott MacDonald required accurate, time-sensitive surveys across 15 railway sites in Scotland, including 12 footbridges and three platforms. UTEC, Acteon’s Geo-services business line, delivered high-quality data within a strict turnaround while minimising time on operational or near-operational tracks. 

Safe surveying at speed

We needed to balance speed, precision and safety and complete all fieldwork quickly, within one to three shifts per site, while working under active rail conditions and reducing the need for costly possessions. 

Our solution

01Engineered for precision

Engineered for precision: a programme built around access and efficiency

We deployed survey teams from our Livingston office to deliver a phased programme across central, northern and northeastern Scotland. 

Our teams surveyed footbridges during daylight hours under a "High Street Environment," using total stations, RTK GPS, laser scanners, platform gauges and laser sweeps. This removed the need for track possessions, reducing project costs and minimising safety risks. 

Platform surveys, which required full track access, were completed by compact four-person teams during short overnight possessions, working efficiently within 3–and 4-hour windows. Prioritising footbridge surveys first allowed time to arrange necessary permissions for platform work without delaying the schedule. 

This collaborative, phased approach, helped meet a compressed schedule while ensuring compliance with Network Rail safety standards. Deliverables, including plans, elevations, cross-sections, laser sweeps, permanent surveys and gauging, were provided within two weeks of fieldwork, allowing the customer to progress quickly to the design phase.

Platform data from one of the train stations where UTEC were contracted to complete 12 surveys of footbridges and platforms for Mott MacDonald.
02Innovations in action

Innovations in action

  • High-accuracy terrestrial laser scanning captured dense, reliable data from a safe distance
  • Structures scanned into registered point clouds (.rcs/.rcp), with topography data delivered in AutoCAD DWG format
  • Direct delivery of indexed point clouds cut processing time, giving design teams access within days
  • Control networks built to Network Rail standards ensured a durable base for future works
Platform data from one of the train stations where UTEC were contracted to complete 12 surveys of footbridges and platforms for Mott MacDonald.

The result

Our scanning-led approach provided Mott MacDonald with accurate, actionable survey data and insight across all structures, delivered on time and with minimal disruption to operational railways. 

By capturing data quickly without relying on extensive track possessions, we improved safety, lowered project costs and reduced environmental impact. Direct access to high-quality indexed point clouds enabled the customer’s design teams to start work almost immediately, helping to keep a strategically important rail infrastructure upgrade firmly on schedule (within the agreed two weeks) and aligned with project milestones.  

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