RWIS

Road weather information system (RWIS) messages can be activated on DMS, using data collected from weather sensors.

Phase actions can change the phase of an action plan based on conditions at an RWIS station.

Condition Fields

There are five weather data fields used for triggering conditions:

1. friction: pavement friction coefficient in percent
2. surface_temp: temperature in degrees celcius
3. wind_gust: gusting wind speed in kilometers per hour (kph)
4. visibility: distance in meters (m)
5. precipitation: one hour precipitation accumulation (mm)

System Attributes

The rwis_obs_age_limit_secs system attribute can be used to adjust the maximum valid age for an observation.