The Complete Management Solution

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SCRIM Surveys

Helping to lower accident rates by identifying where there is a risk of wet-road skidding. Since the mid-70’s Highway Authorities have used the Sideway-force Coefficient Routine Investigation Machine (SCRIM) method to indicate those lengths of road where the skid resistance is below investigatory...

Environmental Landscape

Capable of Operating within an integrated WDM® Highways Management System or as a stand alone data management module. Environmental Landscape Manager (ELM) enables the management of environmental inventory items, trees, verges, planted areas etc. It provides a simple map interface for data collec...

Customer Services

The WDM® Customer Services System module has been designed to control front line customer contact, e.g. call centre operations. The system allows an enquiry or complaint to be recorded and generates the required actions to ensure that enquiry receives a prompt response. An integrated Security Man...


Road Assessment Vehicles (RAVs) carry out high speed data acquisition and recording of surface conditions, including automatic recognition of surface cracking. This gives performance indicators to enable maintenance work to be prioritised and National Indicators to be calculated. WDM® has been un...


The WDM® Lighting Management System (LMS) module has been designed to provide a complete solution for managing both planned and unplanned maintenance operations using the latest map based techniques. The system incorporates all Client and Contractor stages of the process and a comprehensive Secur...

Visual Condition Surveys

WDM® routinely undertake a wide range of visual condition surveys including: ukPMS Coarse Visual Inspection (CVI) WDM® is a major provider of CVI Surveys to Local Authorities. Its large team of fully certified and experienced surveyors use software and vehicles specifically designed to collect v...


WDM® Structures Management System (SMS) module is available as a separate low cost standalone product but is also capable of operating within an integrated WDM® Management System to provide integration between Structures and Highways. SMS is a graphically based system designed to help the Enginee...

Deflectograph Surveys

Highway Authorities have used the Deflectograph for more than 30 years to indicate the strength of their asphalt roads By measuring the condition of all road layers, not just those that can be seen at the road surface, it’s possible to define the backlog and long term budget requirements needed t...

ukPMS Module

Capable of operating as a component within the full WDM® Pavement Management System module, WDM® ukPMS Manager is also available as a separate standalone product designed to satisfy the requirement of Local Authorities to produce Audit Commission Performance Indicators at a low cost.

Routine Maintenance

The WDM® Routine Maintenance System (RMS) module has been designed to provide a complete solution for managing both Cyclic and Non-cyclic maintenance operations using the latest map based techniques. The system incorporates all Client and Contractor stages of the process and a comprehensive Secur...

  • SCRIM Surveys

    Friday, 28 August 2015 13:08
  • Environmental Landscape

    Friday, 28 August 2015 13:08
  • Customer Services

    Friday, 28 August 2015 13:08
  • RAV / SCANNER Surveys

    Friday, 28 August 2015 13:08
  • Lighting

    Friday, 28 August 2015 13:02
  • Visual Condition Surveys

    Friday, 28 August 2015 13:07
  • Structures

    Friday, 28 August 2015 12:57
  • Deflectograph Surveys

    Friday, 28 August 2015 13:08
  • ukPMS Module

    Friday, 28 August 2015 13:08
  • Routine Maintenance

    Friday, 28 August 2015 13:08
The Complete Management Solution

WDM® offers the complete asset management solution supported by unrivalled experience and technical expertise.

Already the UK’s leading manufacturer and provider of highway survey and monitoring equipment, with a unique understanding of highway maintenance and asset management, WDM® is also the UK’s largest survey contractor, serving all UK Government agencies and 90% of local authorities.

WDM® continues to develop pavement monitoring technology, set new industry standards and help clients and partners, both in the UK and overseas, achieve new levels of best practice.


5th SaferRoads Conference 2017


The 5th International SaferRoads Conference will be held in Auckland, New Zealand, in May 2017.

The Conference is run every three years, alternating between the northern and southern hemispheres, and provides a forum for road owners, practitioners and industry experts from across the globe to share ideas, experience and latest technological developments.

Stemming from an idea between New Zealand Transport Agency (previously Transit New Zealand) and WDM®, the Conference began with a focus on skid resistance.

The theme of the 2017 Conference is safe and sustainable road surfaces, a deliberately wider theme than previous conferences. The aim is to provide a forum for focusing on all road and runway surfaces, as well as broader asset management and sustainability.

Since the inaugural event in 2005, SaferRoads has grown to be one of the key industry forums for innovation in the sector and it has played a critical role in improving the performance, sustainability and safety of road surfaces across the world.

The 2017 Conference will take place at Auckland’s Viaduct Events Centre from May 21 – 24. For further information visit

WDM® also maintains an archive website ( ) where papers and presentations from previous conferences are available as a library resource.


Cornwall In Control


Cornwall Council has managed to reduce its carbon footprint by 60% and will deliver an estimated £54m saving on the cost of running 52,000 street lights in the County following the introduction of a comprehensive asset management solution from W.D.M. Limited.
The cost savings will be realised over the next 25 years using the WDM® Integrated Asset Management System (IAMS), a low-risk, high added-value solution delivered over the internet from a Government security approved hosted environment.

Pothole Scanning Solution


Specially adapted Road Assessment Vehicles (RAVs) from WDM® are using laser beams to record defects on roads throughout the UK – and identify early signs of potholes. W.D.M. Limited, the UK’s largest road surveying company, has been using the technology to identify surface cracking since the Millennium. If left unrepaired, it can lead to potholes!

Essex County Council has been using RAVs to show that the condition of its roads improved for the third year in a row in 2014. The data collected is used to prioritise maintenance work by highways engineers. Rodney Bass, the county councillor responsible for highways and transportation, said: “Clearly our priority measures and investment in highway improvements is working. Continually maintaining and upgrading our county routes, which are our priority roads, has a tangible benefit.

The RAV scans are also submitted annual to the Department for Transport as a measure of road conditions nationally. Earlier this year the RAC Foundation claimed that highway authorities paid out more than £3m compensation last year to nearly 49,000 British motorists whose vehicles were damaged by potholes. Last summer the Government allocated a special payment of £168m to local authorities to fill in potholes, but the Asphalt Industry Alliance say a one off investment of £12bn is needed to clear the backlog of outstanding road maintenance.

WDM®’s fleet of eight Routine Assessment Vehicles (RAV’s) operates the length and breadth of the country every year to survey more than 100,000  lane kilometres to gather information about the state of the roads. Richard Dal Lago, Head of Electro-Mechanical Development at WDM®, says: “Our RAV laser scanners take a picture of the highway every two millimetres, identifying any cracking or rutting that requires attention.” WDM® specialises in delivering highway asset management solutions and has been providing road surveying services to both national and local highway authorities for more than four decades. In addition to scanning the network annually, the Company also measures the wet road skid resistance of major roads and motorways, helping deliver safer roads and saving lives.




The TM2 brochure is available in various languages, use a flag to download your prefered choice:-

The updated TM2 surface texture meter with the latest electronics is the result of an extensive in-house research and development programme by WDM® to provide all the functionality of a routine texture measurement instrument, coupled with extensive analysis tools.

The TM2 is recognized as delivering the definitive macro texture measurement standard. The updated TM2 measures a broad swathe of the road profile transversely over a width of 100mm at very frequent intervals to build a detailed record of the surface, with its average texture depth, and delivers repeatable and consistent results.

It is widely recognised that pavement texture is an extremely important factor in the control of surface friction and subsequent road safety. It is also an important parameter for the determination of factors such as noise emission from vehicle tyres.


Roads to Success


The Daily Telegraph Business Club has commissioned an independent film profile of W.D.M. Limited, its approach as a company, how it’s evolved and developed and the factors behind its success. From its beginnings more than five decades ago W.D.M. Limited has focused its attention on listening closely and responding to the needs of its customers. It’s a simple formula, but one that is all too often overlooked as companies evolve and expand. Today the business specialises in designing equipment to monitor highways and pavements and to assess their maintenance needs.

W.D.M. Limited is widely recognised as a leader in its sector, providing services to most UK local authorities, and has reached this position by working closely with its clients to provide equipment and services that are genuinely invaluable. The Daily Telegraph film charts the company’s development and explains how it is working hard to develop the same close relationships with road engineers across the globe. Click here to view.



The main visitor reception is located @

W.D.M. Limited
Staple Hill House
Broad Street, Staple Hill
Bristol BS16 5LT

Google Map Location


W.D.M. Limited
North View, Staple Hill
Bristol BS16 4NX
Telephone: + 44 (0) 117 9567233
Facsimile: + 44 (0) 117 9570351


Southern Hemisphere

W.D.M. Limited
8 Northpoint Street
New Zealand
Telephone: +64 (0)4 2336221

W.D.M. is a registered trade mark of W.D.M. Limited.
© 2011 W.D.M. Limited.


W.D.M. Limited News

Saving Lives Through Safer Roads

WDM® has been surveying the road network annually in New Zealand since 1995, helping deliver remarkable reductions in road casualty rates and resulting in further developments of its SCRIM vehicle through the addition of the latest ITS programming.

Skid resistance of road surfaces is one of the primary factors that determine the safety of roads and the wet skid injury crash rate on road sections with “low” skid resistance is 4.5 to 9 times greater than that for all roads

Results of crash site analysis indicate that a 0.1 increase in skid resistance (measured in terms of Mean Summer SCRIM Coefficient, MSSC) causes a reduction in injury crashes of 30% on wet roads & 20% on dry roads for the New Zealand state highway network. Overall, since SCRIM surveys were introduced, the number of skid related fatalities in New Zealand has fallen by nearly 40%.

The social costs of crashes recorded in the New Zealand Transport Agency’s Economic Evaluation Manual (2010) are: rural fatal $3.881M, rural serious injury $680,000, rural minor injury $83,000.  By helping prevent 250 crashes the monetary benefits have been $159.5M.

Click here to see how New Zealand’s TV Channel, ONE News, reported the  survey operation.