A Roadway Weather Information System (RWIS) is a computerized system that provides real-time weather information with specialized equipment installed by private companies. A variety of gauges and meters can be installed to record and monitor air and dew temperatures, humidity, rainfall, wind speed and direction, pavement temperatures, ground temperatures, visibility, etc. The type of equipment you need is dependent upon what you are trying to accomplish. There are a number of venders capable of providing this equipment.

RWIS is used in varying degrees to support specialized anti-icing and de-icing equipment. RWIS may also be used as an individual, stand-alone weather station in an effort to provide a safe travel way during winter conditions while keeping traffic delays to a minimum. See Chapter 9, Alternate Methods, for more information on the various types of anti-icing and de-icing equipment.

Blackberries and Smart Phones have various weather apps available. Check with your local district regarding any policies concerning downloadable apps.