RoadSmart – Compact Stationary Road Weather Sensor
Expand your coverage – not your budget.
RoadSmart is a compact, non‑invasive road‑weather sensor that delivers real‑time data on road surface conditions for safer, smarter traffic and winter maintenance operations.
- Road Weather, Airports, Railways/Transitions, Smart City Applications
- Optical, capacitive (relative humidity)
- Road Surface Temperature, Water Film Height, Road Condition State (dry, … snow-covered), Friction, Ice Percentage, Snow Height, Relative Humidity (two forms), Dew Point Temperature, Ambient Temperature
- Fast and simple installation, low-maintenance, low operating costs, bridge‑ready and wind‑robust, for decisive action
- ±0.8 K (surface temperature)
- CAN, RS485 (UMB), Bluetooth
- 8811.U55
Advantages
- Densify Monitoring Network: Lufft RoadSmart makes it easy to expand road‑weather coverage where other stations are too large or costly. Its compact, lightweight design installs quickly – even on bridges – and integrates seamlessly with existing systems. This enables operators to close monitoring gaps and build a denser, more resilient sensor network at cost-effective but additional information, e.g. surface state and dew point.
- Reliable Road‑Condition Data for Traffic Safety: Lufft RoadSmart provides accurate, real‑time road‑condition data such as friction, surface state, surface temperature and moisture levels enabling timely interventions, variable traffic‑sign control, and rapid public alerts. By detecting hazards early and supporting decisive actions, it enables smarter interventions, adaptive traffic‑sign control, and faster public warning – improving safety for both drivers and field crews.
- Reduce Maintenance Costs: Lufft RoadSmart’s robust, low‑maintenance architecture reduces lifecycle costs by minimizing site visits and simplifying device protection in the field. Its reliable data output enables more precise, data‑driven winter treatment strategies, lowering chemical usage and overall operational expenditure while supporting both budget efficiency and sustainability targets.
Examples of Use
Designed for
- Road weather monitoring
- Early hazard detection (ice, wetness, reduced friction)
- Real‑time condition assessment for traffic management
- Dense network coverage where traditional stations are not feasible
- Rapid deployment in challenging installation environments (bridges, exposed sites)
- Integrating surface‑condition data into RWIS and ITS platforms
Used by
- Municipal, regional, and national road authorities
- Traffic management centers (TMCs)
- Winter maintenance teams
- Smart mobility and ITS operators
- Engineering and consulting firms
- Airport and railway infrastructure managers
Locations
- Urban, rural, and remote roadside sites
- Bridges and wind‑exposed structures
- Highway corridors and critical segments
- Tunnels and tunnel entrances/exits
- Interchanges, ramps, and high‑risk microclimates
- Smart City infrastructure zones
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EU declaration of conformity - Lufft MARWIS and StaRWIS
EU declaration of conformity - Lufft MARWIS and StaRWIS
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RoHS - MARWIS / StaRWIS
RoHS - Declaration of Conformity / Konformitätserklärung - MARWIS / StaRWIS
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Whitepaper - Road Weather Selection Guide
The Whole World of Road Weather Monitoring
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Download as PDF
Download as PDF
| General | |
| Dimensions | Height approx. 110 mm, width approx. 200 mm, depth approx. 100 mm |
| Weight | 1.7 kg |
| Admissible storage temperature | -40...70 °C |
| Operating rel. humidity | <95 % relative humidity non-condensing |
| Operating voltage | 10...28 VDC on the sensor |
| Power consumption | Approx. 3VA without heating, 50VA with heating |
| Operating temperature | -40...60 °C |
| Operating rel. humidity | 0...100 % RH |
| Protection type | IP68 |
| Surface conditions | Dry, damp, wet, snow-/ice-covered, chemically wet, slush |
| Admissible height above absolute altitude | 3000 m |
| Interface | RS485, 2 wire, half duplex, bluetooth, CAN |
| Road surface temperature | |
| Principle | Optical |
| Measuring range | -40...70 °C |
| Unit | °C |
| Accuracy | ± 0.8 °C @ 0 °C |
| Resolution | 0.1 °C |
| Ambient temperature | |
| Measuring range | -50...70 °C (°F switchable) |
| Unit | °C (°F switchable) |
| Resolution | 0.1 °C |
| Relative air humidity | |
| Measuring range | 0...100 % |
| Unit | % |
| Resolution | 0.1 % |
| Principle | passive, calculated out of air temperature and humidity |
| Relative humidity above road surface | |
| Measuring range | 0 ... 100 % |
| Unit | % |
| Resolution | 0.1 % |
| Principle | passive, calculated out of air temperature and humidity above road surface |
| Dew point temperature | |
| Measuring range | -50 ... 60 °C |
| Unit | °C |
| Resolution | 0.1 °C |
| Principle | passive, calculated out of air temperature and humidity |
| Accuracy | 1.5 °C @ temperature of 0...35 °C |
| Water film height | |
| Principle | Optical |
| Measuring range | 0 ... 6000 µm Max. WFH is only achieved with concrete underground. For asphalt, the maximum measurable water film height is smaller and depends on the distance to the ground. |
| Unit | µm |
| Resolution | 1 µm |
| Accuracy | 10% |
| Snow depth | up to 50 mm |
| Ice Percentage | |
| Measuring range | 0 ... 100 % |
| Unit | % |
| Resolution | 1% |
| Friction | |
| Measuring range | 0...1 |
| Resolution | 0.01 |
