RWIS Summary QA Ref1.xlsx

This is a Road Weather Information System (RWIS) inventory spreadsheet for the Illinois Department of Transportation (IDOT) documenting weather monitoring stations across nine districts throughout the state. The file catalogs 56 RWIS stations deployed at various highway locations including interstate highways, state routes, and bridges, with detailed specifications for each station's equipment configuration including tower types, modems, weather sensors, temperature/dew point monitors, wind measurement devices, and both surface and subsurface pavement sensors. Each station entry identifies the specific highway location, county, GPS coordinates, equipment manufacturers (primarily Vaisala, HMP155, RM Young, and Digi components), and sensor placement details for bridge decks, approaches, and driving lanes.

The inventory reveals a comprehensive statewide network with stations strategically positioned at critical infrastructure points such as major river crossings, interstate interchanges, and weather-sensitive highway segments. Station configurations vary from basic setups with minimal sensors to advanced installations featuring multiple surface sensors, subsurface monitoring capabilities, and specialized bridge deck monitoring equipment. The system utilizes standardized equipment from established manufacturers with consistent communication infrastructure through Digi WR21 modems and lattice tower mounting systems, indicating a coordinated procurement and deployment strategy designed to provide real-time weather and pavement condition data for highway maintenance and traveler safety operations.