In Network Screening - Segments, all roadways are segmented, allowing users to compare smaller portions of a roadway with similar characteristics, rather than evaluating an entire route.
Indiana Segment Criteria
When segmenting a route, a new segment is created each time one or more of the following roadway characteristics change:
Volume on the route (AADT, or Annual Average Daily Traffic)
When the route changes between Freeway/Non-Freeway/Ramp
When a route changes between Urban and Rural
When the Number of Lanes changes
When the Sequence Number changes
Sequence Number: Used to segment noncontiguous routes into individual route segments, preventing segments from overlapping or extending across gaps in the route.
When ownership changes between State and Local
When a route has Interchange Areas
When a Route ID changes
Segmenting using Route ID accounts for changes between undivided and divided roadways. (Note: An undivided/divided filter is available for users across all applications)
Intersection crashes are removed from the Network Screening - Segments application. Crashes are
Note: Routes that are missing from the dataset do not exist in the INDOT Roads and Highways database. Crashes on these routes will not be assigned to any 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 > 10 miles will be segmented at the 10-mile mark.