RAILWAY SURVEYS

What is a railway survey?

A railway survey is the assessment and mapping of the 3D position and condition of railway infrastructure.

This captures the exact geometric location, alignment, condition, and elevation of rail tracks and the features surrounding them. Instead of just measuring standard boundaries, these specialised surveys provide detailed data that supports passenger safety, asset management, and even infrastructure design and expansion.

What we do

Working with strict safety protocols and advanced survey technology, our teams conduct in-depth railway surveys with a calm and confident approach.

Planning and site access

Expert surveyors plan work around busy train schedules and conduct overnight work where possible to avoid travel disruption and ensure surveys are carried out with staff safety at the forefront of every decision.

Establishing control networks

Then, fixed reference points are set up along track corridors with coordinate systems made for long and narrow areas. These controls make sure that all following measurements and calculations are completely aligned.

Data collection

Surveyors use advanced technological trolleys along railways to record track gauge, cant, and exact alignment. Laser scanning and LiDAR record millions of 3D points per second to build a point cloud of everything surrounding the railway, including structures and vegetation. Ground penetrating Radar (GPR) and electromagnetic tools are then deployed to locate and map underground utilities, completely non-invasive.

Data processing and quality checks

We use specialist software to merge all geometric data and mapping into one digital model, overlapping measurements to get a complete and exact picture of the surveyed site.

Deliverables

This data is then turned into digital 3D models and gauging reports for engineers and construction teams, allowing projects to go ahead on schedule and without any extra expenses down the line.

Our services

  • Coordinated track surveys

    We capture plain-line track as well as more complicated Switch & Crossing details by measuring track twists, crossing nose angles, and switch sizes.

  • Control networks

    We establish reference networks linked to Ordnance Survey coordinates and localised site grids, precise to the millimetre for long linear rail corridors.

  • Gauge plate installation

    We measure and install track datum plates (affixed to platform walls and bridge abutments) referencing the exact running edge of the rail after maintenance.

  • Structure gauging

    Our specialist teams capture physical profiles to analyse train passing clearances through the likes of bridges and tunnels.

  • Platform gauging

    This involves mapping platform positions relative to the geometry of rail tracks in order to outline passenger stepping distances and vehicle clearances.

  • Overhead line equipment (OLE) surveys

    Using calibrated gauges with 3D coordinated track survey and chainage systems, we can determine the height and lateral positioning of OLE.

  • 3D laser scanning and BIM

    We scan structures surrounding railways, such as station canopies, walls, viaducts, and bridges to produce point clouds and 3D models for analysis.

  • Drainage and buried utility surveys

    Our teams map drainage systems around tracklines, Under Track Crossings (UTX), and buried power cables for record cards and utility maps.

  • Track and structure deformation monitoring

    We offer manual or automated real-time monitoring of tracks, embankments, retaining walls, and adjacent construction sites, with alarms that sound when structural movement takes place.

Safety first

At Malcolm Hughes, we know that maintaining an in-depth understanding of the safety procedures and parameters is a high-level priority when working in this high-risk environment. All teams are equipped with the latest Personal Protective Equipment (PPE) and our staff hold Personal Track Safety (PTS) certificates, which allow them to work on Network Rail properties.

This achievement is a testament to the hard work of our competent railway survey teams, supported by the management of our systems and the continued provision of quality service to our customers.

RISQS (Rail Industry Supplier Qualification Scheme) is the UK rail industry’s registration and pre-qualification scheme. It is a single entry point for organisations to supply products and services to a large number of buying organisations from the rail industry, including Network Rail. RISQS requires suppliers to undergo a comprehensive assessment process to verify that they have the management capability to meet customer requirements. The audit is designed to make sure that the company complies fully with the rail industry’s health and safety, quality and environmental practices regulations.

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Keeping your project safely on track

Partnering with Malcolm Hughes Land Surveyors brings over 40 years of geospatial expertise straight to your railway infrastructure project.

As a RISQS-accredited survey specialist, MHLS brings in-depth industry knowledge and the most advanced technology so you can deliver your project with completely reliable datasets, no matter how challenging the environment is.

We’re dedicated to carrying out surveys efficiently and hold safety to the highest standard by minimising disruption and maintaining compliance every step of the way.

Get in touch with us to discuss your site requirements and get started on reducing project risk with Malcolm Hughes today.

Related Case Studies

Track Renewal Rail Survey

The Malcolm Hughes team delivered precise rail surveys that ensured the successful and safe completion of a critical track renewal project.

Blackhorse Road, London

This project on a London Trams rail bridge utilised several of the services available here at Malcolm Hughes, highlighting our expertise in a variety of areas.

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