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SCRIM® Surveys

Operational efficiency and safety aligned with national standards for skid resistance strategy

WDM’s SCRIM® surveys deliver high-precision friction data across entire road networks-supporting smarter decisions, earlier interventions, and safer outcomes.

Experts in Friction Measurement

WDM took the idea of a sideway force friction measuring principle over 50 years ago and developed technology to produce reliable and repeatable results, leading to the design of SCRIM® mechanisms manufactured and mounted onto SCRIM® survey vehicles built by WDM. We’ve been advancing the technology ever since. As the most widely adopted continuous friction measurement system worldwide, SCRIM® survey vehicles and equipment set the standard for repeatability, accuracy, and impact.

By continuously measuring surface friction and capturing geolocated texture and condition data, SCRIM® surveys empower you to monitor risk, inform policy, and invest with confidence.

  • Prevent Wet-Weather Incidents

    Identify low-friction zones before they contribute to collisions, enabling proactive interventions that keep all road users safer.

  • Optimise Maintenance Spend

    Use accurate, real-time data to prioritise resurfacing and treatments-ensuring budgets are focused where they’ll have the most impact.

  • Support Regulatory Compliance

    SCRIM® helps meet national and international skid resistance standards, supporting evidence-based safety policies and audits.

  • Extend Asset Life

    Targeted friction data enables timely maintenance, slowing deterioration and increasing the lifespan of high-risk sections of road.

Why SCRIM® Surveys Are Operationally Better for New Zealand Roads

  • Designed for Network-Level Coverage

    SCRIM® is purpose-built to survey large sections of road networks efficiently, making it ideal for New Zealand’s diverse state highway and local road systems. It collects continuous friction data at traffic speeds, minimising disruption and allowing comprehensive assessment of network-wide surface safety.

  • Proven Alignment with NZTA Skid Resistance Strategy

    SCRIM® surveys form the core measurement standard adopted by Waka Kotahi NZ Transport Agency for the national skid resistance strategy. This ensures consistency and comparability of data across all regions and contractors.

  • Real-World, Wet-Condition Testing

    The SCRIM® system measures friction under controlled wet conditions, which is the most relevant scenario for skid-related crashes in New Zealand’s variable climate. This gives engineers and asset managers realistic insight into how surfaces perform when safety margins are lowest.

  • High Repeatability and Data Quality

    SCRIM® equipment and processes are calibrated, validated, and internationally standardised, giving confidence that the friction data collected is accurate, repeatable, and traceable over time. This allows long-term trend analysis and evidence-based maintenance planning.

  • Operational Efficiency and Safety

    Surveys are conducted at normal traffic speeds, meaning no lane closures, pilot vehicles, or significant traffic management are required. This reduces operational risk, cost, and disruption for road users.

  • Supports Targeted, Cost-Effective Maintenance

    By pinpointing sections of road with declining friction before crashes occur, SCRIM® data enables authorities to prioritise interventions, optimise resurfacing schedules, and achieve better safety outcomes for every maintenance dollar spent.

Book a SCRIM® Survey or Talk to Our Team

Our experts can help you integrate high-precision skid resistance testing into your road safety and maintenance strategy.

Talk to a surveying expert today

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