Sideway-force Coefficient values
The core dataset, recorded at 1m or 10m intervals, indicating surface grip under wet conditions, critical for assessing skidding risk.
SCRIM® Data
Friction data that drives smarter decisions
Using SCRIM® technology, WDM New Zealand provides consistent, objective measurements of surface friction across the network. By capturing Sideway-force Coefficient values under real-world conditions, we deliver trusted data that supports NZTA, local authorities, and consultants to understand surface performance, assess skid risk, and plan targeted safety interventions with confidence.
Benefits of SCRIM® data:
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GPS-referenced measurements
Precise geo-located data that can be mapped, overlaid, and aligned with other asset datasets.
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Seasonal and temperature-adjusted values
Adjusted for variables such as weather and road temperature to provide fair and standardised comparisons across time and location.
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Polished Stone Value (PSV) correlation
When used in conjunction with material data, SCRIM® outputs can inform maintenance plans based on aggregate durability and surface polishing trends.
Why this data matters to your network?
SCRIM® data offers direct insight into the grip performance of your road surfaces – one of the most safety-critical factors for any road environment. Low SFC values flag where drivers may be at risk of losing control, especially during wet weather, at braking zones, or on high-speed sections.
This data is vital not only for compliance with design and safety standards but also for optimising asset investment. By identifying deteriorating friction well before visible defects or collisions occur, authorities can prioritise treatments, target resurfacing budgets, and minimise public liability exposure. It also enables strategic comparisons between materials, treatment types, and road classes over time.
WDM’s datasets can be supplied raw or fully processed, integrated with your GIS or asset systems, and combined with other road condition indicators such as IRI, rutting, or cracking for whole-network planning.
Why WDM for SCRIM® data?
- National leader in Sideway-force data collection and processing
- Outputs aligned with UK DMRB and national skid policy frameworks
- Data formatted to integrate with GIS, lifecycle planning, and decision-support tools
- Backed by decades of expertise in road safety, pavement science, and asset strategy
At WDM, we don’t just hand over data – we deliver clarity. Our SCRIM® datasets are trusted by New Zealand’s largest road authorities to inform action, reduce risk, and ensure that every kilometre of network is backed by defensible, engineering-grade evidence.
Get the SCRIM® data your decisions depend on
Request a dataset, explore integration options, or speak to our experts.
More surveying services
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SCRIM® Surveys
See how WDM collects Sideway-force data across the UK network, using the largest SCRIM® fleet and fully calibrated systems.
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Skid Resitance Strategy
Find out more about how we can support your road safety initiatives with SCRIM® delivered skid resistance data