Road Management Services

Setting global standards
Making the world’s roads safer

W.D.M. Limited is a world leader in delivering safer road surfaces. Equipment and services from the UK’s leading manufacturer and provider of road survey, motorway maintenance and road condition assessment, have been used in more than 18 countries around the globe, helping deliver reductions in skid related road fatalities of up to 40%.

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We’re in the business of saving lives
40% reduction in skid related road fatalities

Over the past two decades W.D.M. Limited has helped the New Zealand government achieve up to a 40% reduction in skid related fatalities on its highway network, with a cost-benefit return of 35 to one.

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It’s our people who make the difference
Innovation and experience

W.D.M. Limited combines more than 40 years of experience in road condition assessment with cutting edge technology in all its survey vehicles to deliver repeatable, reproducible and reliable data, enabling road engineers to manage their highway and road assets in the most cost-effect way.

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Celebrating the revolutionary road surveying vehicle
SCRIM®

W.D.M. Limited celebrate the 50th anniversary of SCRIM® in 2017 – it was the machine that resulted in the company first becoming involved in the highway asset management sector WDM® celebrate the 50th anniversary of SCRIM® in 2017 – it was the machine that resulted in the company first becoming involved in the highway asset management sector.

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Highway Asset Management Specialists
We’re leading the way

W.D.M. Limited is the highway and road asset management partner of choice – reliable and cost-effective road inspection and surveying; strategic analysis and consultancy support, plus bespoke pavement management services and software to deliver the ultimate solution.

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THE COMPLETE MANAGEMENT SOLUTION

W.D.M. Limited offers the complete highway asset management solution and is committed to helping improve road safety and saving lives.

The Company is the UK’s leading manufacturer and provider of highway condition surveying and monitoring equipment, with a unique understanding of highway maintenance and road asset management, supported by unrivalled experience and technical expertise.

WDM^® is also the UK’s largest survey contractor, serving all UK Government agencies and the majority of local authorities, and continues to develop road condition monitoring technology, set new industry standards and help clients and partners in the UK and overseas, achieve new levels of best practice in road safety.

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news

WDM Completes Build of New Midi-SCRIM® Model

W.D.M. Limited has successfully completed manufacture of the first Midi-SCRIM®, the newest model in its fleet of surveying vehicles. The Midi SCRIM® is a smaller, more efficient version of the revolutionary SCRIM® machine, designed to measure road surface friction, informing pavement management and maintenance programmes. SCRIM® has been pivotal in improving road safety globally for over 55 years, informing skid strategies with accurate, robust and repeatable data collection. The new midi SCRIM® passed its IVA tests in April and is scheduled to start work surveying the roads this summer, alongside the company’s...

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WDM Progresses Towards PAS 2161 Survey Compliance

WDM has submitted two data sets for demonstration purposes to TRL for evaluation across the three PAS 2161 sample networks, marking a key milestone in the approval process for its survey methodologies. The first uses a combination of traditional and new defects collected using the WDM Road Assessment Vehicles. The second employs WDM’s bespoke visual surveying software to capture Road Condition Categories aligned with PAS 2161 standards. All submitted data, including that from other providers, will be assessed against reference engineer results using the methodology set out in PAS 2161. Once this evaluation is complete, WDM expects to offer PAS 2161-compliant...

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WDM Exhibiting at ILP Conference 2025

W.D.M. will be exhibiting at the ILP Lighting Live Annual Conference on 18–19 June at the Crowne Plaza Hotel in Glasgow. This two-day event will feature CPD-accredited talks, exhibitions, and networking opportunities. We will be showcasing our advanced Lighting Management System at the conference, designed to help local authorities and infrastructure teams manage street lighting operations. Features include real-time asset tracking, energy reporting, fault management, and maintenance planning, supporting smarter, more efficient lighting networks. Join us for a demonstration of out LMS and see how we're helping councils across the UK transform their lighting strategies. Don't...

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WDM is at HAUC 2025

WDM will be exhibiting at the HAUC(UK) National Convention 2025, taking place this year with a focus on innovation, collaboration, and efficiency across the street and road works sector. Join us on Stand 6, where our team will be showcasing the powerful capabilities of our Streetworks System — designed to transform the way local authorities and utilities manage and coordinate works on the highway network. Built to support operational teams, contractors, and planners, WDM’s Streetworks System is a proven solution that brings compliance, integration, and time-saving features to the forefront of your workflow. Key Benefits...

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Extreme Weather Modules

Extreme wet weather is becoming an increasing challenge across the British Isles and has affected nearly every organisation that we work with over the last few years. In response to this we have been implementing new and improved HIAMS modules across the country to support extreme wet weather management. These modules have been developed for customised requirements, but the systems are available widely, to support individualised requirements, so please get in touch if you would like to discuss how our software can support your efforts to minimalize wet weather disruption. Flood Risk Management System The FRMS module was developed...

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video

W.D.M. Limited & Sky TV: Road Networks - Challenges and Sustainability

Executive TV’s latest in depth programme, “Road Networks - Challenges and Sustainability”. WDM are a highway asset management solution specialist committed to helping improve road safety and saving lives. Using cutting – edge road condition monitoring equipment, WDM is recognised as a world leader in...

Waka Kotahi NZ Transport Agency & SCRIM

Check out our SCRIM in action as part of the Waka Kotahi NZ Transport Agency efforts to reduce skid-related accidents on NZ roads. In addition to responding to found defects, Waka Kohati uses the data to monitor highway performance, plan and predict future work programmes.

High Friction Surfacing SCRIM® Performance - Mark Stephenson Presentation

Mark Stephenson, Head of Consultancy Services at W.D.M. Limited, gave delegates at the Road Surface Treatment Association seminar an insight into the research carried out on the effectiveness of high friction surfacing.

WDM® SCRIM® road survey vehicle

WDM® “The Road to Success” from The Telegraph BusinessClub
SCRIM® celebrates 50th anniversary

To celebrate the 50th anniversary of the SCRIM® road survey vehicle, we shared a SCRIM® fact each week during 2017.

Fact #52: In 1990 WDM® was the first to have traffic management employed when SCRIM® measured surface friction of roads in Singapore. Police outriders stopped traffic at junctions to allow the survey to continue without interruption.

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