In Network Screening - Segments, all routes in Alabama are subdivided into segments. This allows you to compare smaller portions of a roadway with similar characteristics, rather than evaluating an entire route.
Segment Criteria
When segmenting a route, a new segment is created each time one or more of the following roadway characteristics change:
Volume (AADT, or Annual Average Daily Traffic)
Urban/Rural
Functional Classification
Number of Lanes
Divided/Undivided
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 > 10 miles will be segmented at the 10-mile mark.