Road Weather Information System (RWIS)
Meteorological and environmental data:
- Visibility and present weather
- Wind speed and direction
- Precipitation type and intensity
- Air temperature and Relative Humifity
- Atmospheric pressure
- Lightning and storms
- Pollution and air quality
Pavement conditions:
- Pavement and soil temperatures
- Freezing point of the surface
- Condition of the pavement as wet, icy, flooded
- Chemical concentration of ice fluxes on the pavement
For the interior of the tunnels:
- Visibility
- Airflow
- Gas concentration
- Illumination
Other data:
- Water level in streams or rivers near roads
- Accumulation of snow
- Environmental Noise
Examples of weather stations for tunnels and roads
