Average Annual Daily Traffic - 2025

This feature service provides detailed information on annual average daily traffic (AADT) volumes for roads in the state of Illinois, specifically covering parts of counties within the region. The data includes traffic counts categorized by vehicle types, including heavy commercial vehicles, multi-unit vehicles, and single-unit vehicles, offering insight into transportation and road usage patterns. Feature Layer Average Annual Daily Traffic: This layer represents segments of roads with comprehensive traffic volume data. It includes attributes such as inventory numbers, route identifiers, road and county names, and several traffic measurement fields indicated both as textual and numeric values. This layer is instrumental for traffic analysis, road maintenance planning, and transportation logistics within Illinois.