In Network Screening - Segments, all routes in Tennessee are subdivided into segments to make network screening easier. This allows you to compare smaller portions of a roadway with similar characteristics in Network Screening rather than evaluating an entire route.
Segment Criteria
Volume on the route (AADT, or Annual Average Daily Traffic)
When a route’s Median Type changes
When a route changes its Functional Classification
When the number of lanes changes on the route
After segments are created following the guidelines above, minimum and maximum segment lengths are used to ensure that segments are not too small or too large.
Min/Max Segment Lengths
Any segment that is < 0.1 miles will be added to the smallest adjoining segment.
Any segment that is > 5 miles will be segmented at the 10-mile mark.