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Integrated road weather systems for effective driver messaging


Drivers may not be aware of the road conditions that are ahead and drive at inappropriate speeds for the conditions. It can be difficult to notify drivers with timely information at the correct location and time


Use RWIS to turn weather and road data into meaningful insights. Integrate the RWIS meteorological data to trigger the signs to alert drivers via navigation app or signage about notable hazards.


By advancing a system to enable driver messaging, information is spread widely to the public in a timely manner. Thus, increasing driver awareness and preventing accidents due to inclement weather.

Our team of experienced project engineers and skilled technicians is there to explore individual solutions for your road weather monitoring challenge. Advanced RWIS for Driver Messaging The North Dakota Department of Transportation (DOT) in partnership with OTT HydroMet and Haas developed a complete solution for effective messaging in a notoriously difficult weather corridor. The solution integrates several sensors to capture the road conditions with intuitive software platforms to feed the data into a navigation app for immediate notification.

  • Trusted suite of road weather instruments from the OTT HydroMet product brand Lufft
  • Easy integration to activate signage with the help of flexible software solutions
  • Successful collaboration to deliver a customized solution that can be redeployed to other areas
Non-invasive road weather sensor, RWIS, road sensor, stationary road weather system, road weather, friction

Non Invasive Road Sensor NIRS31-UMB

The NIRS31-UMB is a non-invasive road weather sensor with optical principle. It is mounted several meters above the ground and can even monitor bridges...

The NIRS31-UMB is a non-invasive road weather sensor with optical principle. It is mounted several meters above the ground and can even monitor bridges...

  • Layer thickness of water, snow and ice, surface conditions (dry, damp, wet, snow, ice), friction, road surface temperature, saline concentration
  • Optical principle, pyrometer
  • non-invasive, easy to install and add to existing measurement networks, friction measurement, real time data providing
  • UMB-binary, SDI-12, ASCII-UMB, analog outputs in combination with digital-analog-converter DACON8-UMB
Compact Weather Sensor WS300 with detection of temperature, relative humidity, air pressure

WS300-UMB Smart Weather Sensor

Compact all-in-one weather sensor for measurement of temperature, relative humidity and air pressure.

Compact all-in-one weather sensor from the WS-Series. Measurement of temperature, relative humidity and air pressure.

  • Temperature, relative humidity, air pressure
  • NTC/T, Capacitive/RH, MEMS capacitive/Pressure
  • Compact all-in-one weather sensor, low power, aspirated radiation shield, maintenance-free operation, open communication protocol
  • RS485 with supported protocols UMB-Binary, UMB-ASCII, Modbus-RTU, Modbus-ASCII, XDR and SDI-12
Lufft Visibility Sensor VS20k - detection of visibility, fog, dust - road application, road weather, traffic weather rwis

Visibility Sensor VS20k-UMB

New product version of the known Lufft VS20 visibility sensor with a measurement range of 10...20'000m, easy calibration functionality, sea waterproof housing and (active) spider defense

The VS20k visibility sensor measures visibility up to 20'000 m, ideal for road traffic applications on motorways, highways or bridges. Long life time is guaranteed thanks to the sea-water proof housing design.

  • Visibility (measuring range 10 ... 20'000 m, resolution 1m)
  • 45° forward light scattering
  • suitable for extreme ambient conditions, active spider defense, seawater resistant, compatible interfaces
  • RS-485, analogue output
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