ARWIS

Road Weather Information System consists of multiple sites, each containing various meteorological sensors collecting weather information such as ambient temperature, relative humidity, air pressure, wind speed/direction, solar radiation, precipitation, and visibility; all information being reported to a central location for an up-to-date viewing of incoming data.

Road state information is collected through an Intelligent Road Sensor (IRS), capable of measuring surface as well as sub-surface temperatures, snow, ice and water film height.  Chemical concentrations and freezing temperatures are obtained as direct outputs of this sensor.

ARWIS Systems

All sensors connnect to a remote processing unit (RPU) installed in close proximity to the roadway.  A server polls each RWIS at a predetermined interval or on a "change on event" based algorithm.  The server collects and stores the data and uploads it to an internet-based user interface.  Road maintenance crews access the latest information through a standard internet browser. 

To view online information direct from an existing location go to;

 http://mail.lufft.de:8085/0000000006/index.html

(The above site is in Germany, therefore the information displayed is in German for use by the local engineers. Systems information will be supplied in your country's official language.)