Cumulative AADT

The Idaho Transportation Department’s Annual Average Daily Traffic (AADT) dataset represents the average number of vehicles traveling on roadway segments per day, averaged over each calendar year. This data, spanning from 1999 through present, is collected via permanent traffic counters, short-term studies, and statistical estimation methods on Idaho’s state highways and select local roads. The AADT dataset is foundational for transportation planning, roadway design, traffic safety analysis, infrastructure funding, and environmental assessments. It is used by engineers, planners, agencies, and researchers to prioritize maintenance, design new infrastructure, and analyze long-term traffic trends and patterns. The dataset provides a comprehensive historical record of traffic volumes across Idaho’s transportation network. Users should note that data collection methodologies and technologies may have evolved over time. Please note that this is a static view of yearly AADT data as of the last day of each year included. This content item is a sub-layer of the Traffic authoritative feature layer. Metadata