SCRIM® Machine
The original and still the standard
Complete Visibility and Control of Your Highway Assets
Manufactured by WDM and trusted worldwide, the SCRIM® machine is the benchmark for measuring wet road skid resistance. Designed for network-scale surveys, it delivers continuous, accurate data to help highway authorities manage risk, prioritise resurfacing, and meet national safety standards.
Built and supported exclusively by W.D.M. Limited, SCRIM® meets BS 7941-1:2006 and is certified to AASHTO TP-143-21(2003) and CEN/TS 15901-6. It remains the most widely adopted system of its kind, setting the standard for road safety performance across the UK, Europe, Asia, and Australasia.
Built for accurate, repeatable friction data
- Continuous side-force measurement using a 20° angled test wheel
- Operates at 25–85 km/h, with target speeds of 50 or 80 km/h
- Up to 300 km of survey coverage per day
- Speed-corrected friction data processed onboard in real time
- Captures IRI, GPS, video, geometry, and texture in a single pass
- Equipped with dynamic vertical load and water flow control systems
- Water capacities range from 3,000-11,000 litres
- Complies with BS 7941-1:2006, AASHTO TP-143-21(2003) and CEN/TS 15901-6
Integrated performance: SCRIMTEX®
Every SCRIM® can be fitted with SCRIMTEX® – a macrotexture measurement enhancement that builds on SCRIM® friction capabilities.
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Supports dual-wheel path measurement in double-sided setups
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Optional temperature measurement of air, surface, water and tyre
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Provides deeper insight into road surface safety and condition
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Fully integrated with WDM’s analysis and reporting tools
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Speed-corrected friction data processed on-board in real time
Where SCRIM® delivers value
- Network-wide skid resistance monitoring
- Annual safety and compliance assessments
- Identifying high-risk sections at bends, approaches, and junctions
- Monitoring treatment effectiveness over time
- Supporting scheme justification and public safety reporting
Explore the connected system
WDM software is modular by design – but most powerful when combined. These collections integrate seamlessly to create one intelligent, joined-up platform:
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Explore Midi SCRIM
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Speak to a Product Specialist
Need support choosing the right SCRIM® setup for your fleet or region?
Our team can help you specify, configure, and deploy SCRIM® with confidence – including support with data integration, fleet planning, training, and servicing.
