Road Surface Alerts
Using connected vehicle data to deliver precise, real-time hazard warnings that enhance road safety and driver awareness.
Premium Road Surface Alerts based on real-time vehicle data
Drivers are constantly exposed to changing road conditions, from sudden loss of grip to standing water or poor visibility. These conditions can vary rapidly across a road network, making it difficult to predict where risks will occur. Most alert systems rely on assumptions, using weather models or manual crowdsourcing where drivers report perceived conditions. These approaches do not measure the road surface itself, which limits their accuracy, consistency, and reliability.
Road Surface Alerts (RSA) by NIRA is a premium, software-based connected vehicle service that delivers real-time, map-matched warnings based on direct measurements of road conditions. By analyzing how vehicles interact with the road surface, RSA identifies hazards using real-time data rather than inferred or subjective inputs. This results in accurate, high-confidence alerts across the network.
Built on continuous data from millions of connected vehicles, RSA creates a dynamic and verified layer of road condition insights. Each alert is grounded in actual vehicle behaviour, ensuring that information reflects real conditions as they develop. The service can be seamlessly integrated into navigation systems and driver interfaces, and supports all major map providers.
This enables safer route planning by identifying and avoiding hazardous road segments, while also providing drivers with timely, location-specific warnings during the journey. Alerts are delivered before drivers reach the hazard, giving them time to react and adapt.

Available Road Surface Alerts (RSA) data types:
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Slippery road: Detects low-friction surfaces using real-time vehicle data, indicating conditions where tire grip is significantly reduced.
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Hydroplaning: Identifies elevated risk of hydroplaning due to water accumulation, where tire–road contact is compromised.
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Very rough road: Highlights segments with high surface irregularity, impacting vehicle dynamics and ride stability.
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Pothole: Pinpoints road surface damage and anomalies.
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Heavy rain: Indicates rainfall intensity levels that significantly affect friction, braking performance, and visibility.
- Slow traffic alert: Detects places where traffic is moving drastically slower than usual.
Use cases: Where NIRA’s Road Surface Alerts makes the difference
Road Surface Alerts provides critical safety information for a wide range of applications and users.
For automotive OEMs:
Support Euro NCAP ratings: Enable safety features aligned with Euro NCAP requirements, contributing to higher safety ratings through premium hazard alerts.
Improve driver safety: Offer a premium safety feature that provides precise, map-matched warnings at exact hazard locations, increasing driver awareness and confidence in adverse conditions.
Safer route planning & navigation: Enable route planning that avoids known hazards, with real-time alerts before drivers reach dangerous areas and dynamic re-routing around black ice and flooding.
For Tier 1 suppliers & developers:
Euro NCAP-aligned premium alerts: Offer high-quality road hazard alert functionality aligned with Euro NCAP requirements, enabling OEM customers to improve safety ratings with accurate, real-time alerts.
Build safer and more advanced driver assistance systems: Integrate real-time hazard alerts into navigation, mapping, and ADAS features, while leveraging high-resolution road condition data to develop new safety-focused services and driving features.
Seamless platform integration: Easily integrate Road Surface Alerts into existing automotive platforms using flexible APIs.

For fleet owners:
Safer driving in real-world conditions: Provide drivers with early hazard warnings that help them adapt to changing road conditions, reducing risk in everyday operations.
More reliable arrival times: Use real-time road condition insights to better anticipate delays and improve ETA accuracy across routes and shifts.
Minimize disruptions in daily operations: Avoid unexpected incidents and unplanned stops by giving drivers time to react to hazards ahead, helping keep vehicles and operations moving.
How the Volkswagen Group improves driver safety with real-time road insights
Delivering premium alerts through real-time data

- Coverage where it matters
NIRA’s proprietary road monitoring algorithms operate at scale, powered by millions of connected vehicles capturing real road conditions across both high and low friction, not just extreme events. This ensures consistent, high-quality coverage across the road network.
- High-quality, data-driven insights
Advanced models interpret signals from road conditions and vehicle dynamics to detect and verify real-world hazards. Each alert is based on measured data, ensuring a high level of accuracy, reliability, and confidence. - Precise warnings at relevant locations
With millions of connected vehicles across Europe and the US, NIRA delivers broad coverage and continuous updates. Alerts are precisely map-matched and delivered at the exact location where they are needed, maintaining a high and consistent quality standard. - Built to evolve
From slipperiness detection to an expanding set of road condition insights, NIRA continuously develops its capabilities based on real-world data ensuring the service remains premium in both quality and performance as new risks emerge.
Download sample data & our Product Guide

How does NIRA’s premium alert service work?
Road Surface Alerts transform real-time vehicle data into precise, location-specific hazard warnings at scale.
1. Friction measurement from vehicle sensors: NIRA’s software-based friction estimation uses existing vehicle sensors to measure real tire–road interaction, delivering near-continuous friction data across both low and high friction conditions.
2. Anonymized data aggregation: This friction data, along with other sensor readings, is collected from millions of connected vehicles. All data is fully anonymized, ensuring privacy while building a robust, large-scale dataset.
3. Cloud-based analysis and hazard verification: Aggregated data is map-matched and analyzed in the NIRA cloud, where advanced models identify and verify hazardous road conditions based on consistent signals across vehicles.
4. Precise, real-time alerts: Once a hazard is confirmed, alerts are delivered to approaching drivers, providing time to react and adapt to upcoming conditions.
Road Surface Alerts – in a minute

Q&A
Frequently Asked Questions about Road Surface Alerts (RSA):
What is Road Surface Alerts (RSA)?
Road Surface Alerts RSA is a connected vehicle service that delivers real time, location specific warnings about hazardous road surface conditions. By analysing how vehicles interact with the road surface, rather than relying on temperature alone, RSA provides accurate alerts that are directly relevant to the driver’s route and position.
How does Road Surface Alerts work?
Road Surface Alerts transforms vehicle sensor data into actionable hazard alerts through a structured process:
- Software uses existing vehicle sensors such as wheel speed and steering angle to detect small changes in grip between the tires and the road.
- Anonymized vehicle data from millions of vehicles is aggregated in the cloud.
- The data is analysed and matched to digital maps to identify hazardous road segments.
- When a hazard is confirmed, precise warnings are sent to vehicles approaching that location.
What types of road hazards does Road Surface Alerts detect?
Road Surface Alerts detects hazards related to road surface conditions, including slippery surfaces caused by ice or water, risk of aquaplaning, and other surface irregularities that affect grip and stability. The alerts are based on actual vehicle road interaction data rather than indirect weather signals.
How is Road Surface Alerts different from generic temperature-based warnings?
Traditional vehicle warnings often rely on temperature thresholds, such as a snowflake symbol, to indicate potential risk. Road Surface Alerts instead analyses real vehicle data to detect actual changes in road surface behaviour. This enables more precise, location specific warnings that reflect real world driving conditions.
How does Road Surface Alerts enhance vehicle safety?
By providing early warnings about hazardous surface conditions ahead, Road Surface Alerts increases driver awareness and gives drivers time to adapt speed or driving behaviour. This reduces the likelihood of being surprised by sudden changes in grip.
Can Road Surface Alerts be integrated into different platforms?
Yes. Road Surface Alerts can be integrated into built in vehicle navigation systems, vehicle applications, and third party applications used by drivers, fleets, or transport services.
What makes NIRA Dynamics’ Road Surface Alerts unique?
Road Surface Alerts is built on NIRA Dynamics’ friction estimation technology and uses aggregated data from millions of connected vehicles. This enables precise, map matched warnings at the exact locations where hazards occur, based on real world driving data.
How does Road Surface Alerts use vehicle sensor data?
Road Surface Alerts leverages data from existing vehicle sensors to measure small variations in tire and road interaction. All vehicle data is anonymized and aggregated in the cloud to ensure privacy while enabling accurate detection of hazardous road conditions.
How are hazard warnings delivered to drivers?
Once a hazardous road segment is identified through cloud based analysis, Road Surface Alerts generates precise alerts that are delivered to vehicles approaching the affected area. This gives drivers advance notice of potentially dangerous surface conditions.
Can Road Surface Alerts support fleet safety and connected vehicle services?
Yes. Road Surface Alerts can enhance fleet safety and connected services by providing timely road surface warnings as part of broader vehicle data solutions. This improves road awareness and supports better decision making for both drivers and fleet operators.




