Traffic volume

The highway network is divided into approximately 1600 sections for reporting purposes. Seasonal traffic volume variations are estimated for each section.

Although local conditions cause variations, the volumes shown are considered to adequately represent the section. On highways that overlap one another (e.g. Highway 35 and Highway 115) the volume information is referenced to the lower number highway. When an overlap occurs between a freeway and non-freeway, reference is made to the freeway route number.