Traffic information is an important component of Transportation Planning. Data related to the number of vehicles per day using a particular roadway is important for monitoring congestion and roadway performance, and helping to prioritize travel demand and need for projects/improvements. Average daily traffic is collected in by a number of entities. Primarily, average daily traffic counts are collected the Departments of Transportation (DOTs) on a cyclical basis. Some roadways, such as interstates, may have continuous monitoring or annual data collection cycles. Other roadways may have average daily traffic collected on a five-year cycle. Local roads are typically monitored by the local government responsible for its maintenance and traffic data may only be collected as needed.
For up-to-date average daily traffic, refer to the sidebar and links to this data.
Up-To-Date Average Daily Traffic Counts
Illinois DOT | Iowa DOT: County | Iowa DOT: City