In Network Screening - Segments, all routes in Wisconsin 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.
NOTE: The Network Screening applications display both local road and State Highway segments on a single map.
When segmenting a route, a new segment is created each time one or more of the following roadway characteristics changes:
Volume on the route (AADT, or Annual Average Daily Traffic)
When a route changes between Urban and Rural
When a route changes between Freeway and Non-Freeway
When the number of lanes changes on the route
When a route changes between Divided and Undivided
When a route changes between Two-Way Left-Turn Lane and Other Median Type
When a route changes between State Highway Network and Local Road Network
When the route intersects a State Highway Intersection
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
After segments are created following the criteria above, minimum and maximum segment lengths are used to ensure that segments are not too small or too large, based on the following parameters:
Any segment that is < 0.05 miles will be added to the smallest adjoining segment.
Any segment that is > 2 miles will be segmented at the 2-mile mark.
Local Road Crashes
All crashes on Local Road segments are designated as taking place on the Primary side.
NOTE: For Local Road segments, “Primary” and “Opposite” refer to the direction of traffic flow.
This is called “Cardinal” and “Non-Cardinal” for State Highway segments.
State Highway Crashes
Divided roadways within the State Highway Network will have both Cardinal and Non-Cardinal designations. Crashes on undivided State Highway roadways will always be designated as Cardinal.