For the last five decades W.D.M. Limited has been designing equipment to monitor highway pavements and assess maintenance needs and is recognised as a world leader in its sector.
The Company was founded in 1945 to provide engineering support for industry and government and began developing and manufacturing the Sideway-force Coefficient Routine Investigation Machine (SCRIM) for the Transport Research Laboratory in the late ‘60’s.

WDM® continues to be the World’s only licensed producer of SCRIM and has since added to its range of advanced technology equipment. The Company has also developed software surveying and consultancy divisions to provide clients in the UK and overseas with the complete highway maintenance management service.

Already the UK’s leading manufacturer and provider of highway asset management highway survey and monitoring equipment WDM® is also the UK’s largest survey contractor serving all UK Government agencies and most local authorities helping them reach new levels of best practice and consistently achieve more for less!

WDM® continues to be at the forefront of developing pavement monitoring technology setting new industry standards and recognises the importance of delivering road safety within asset management plans.

It’s TM2 manually operated mini texture meter was an Innovation of the Year finalist at Intertraffic Amsterdam on its launch in 2012 and is a viable alternative to the traditional sand-patch test for measure macro-texture delivering both SMTD and MPD.

The Company has successful relationships with both Transport Scotland and the Welsh Government dating back over two decades as well as the New Zealand Transport Agency consistently delivering on its promises as well as providing added value at every level. Quite literally WDM® goes the extra mile!

WDM® specialises in building strong and effective working partnerships to deliver the ultimate solution and the best possible value which includes both software and road condition surveys as a single integrated solution:

• A Service delivery team with over 20 years’ experience of delivering software solutions road condition surveys and consultancy.
• Service delivery by a family owned Company with a clear business plan focussed on business continuity and unaffected by changing shareholder values.
• A Company dedicated to delivering service through a partnering approach and because of its market position able to offer added value and innovation
• A low risk high added value solution.

At a time when other survey contractors are over-committing themselves WDM® consistently delivers data on time to every client and is unique in being the only single supplier with a history of providing all the service types required:

• Fully accredited survey vehicles. The fleet includes Deflectographs SCRIM and Road Assessment Vehicles (RAV) covering Scanner requirements plus CVI vehicles. All are assessed and licensed annually by TRL.
• Largest developer and manufacturer of survey equipment with spares in stock so not reliant on outside suppliers.
• UK’s largest survey contractor undertaking around 230000km per year
• Highly qualified and experienced staff including software developers engineers and consultants plus a team of Civil Engineers.


designing equipment highway maintenance management service highway pavements monitoring pavement scrim sideway-force coefficient routine investigation machine surveying technology wdm

  • 0117 956 7233
  • North View, Staple Hill, BS16 4NX

Contact WDM Ltd