The Predictive Analysis application facilitates creating, managing, evaluating, and updating an agency’s Safety Performance Functions (SPFs) in an easily accessible interface.
Learn more about the Predictive Analysis application here.
Segments: Predictive Attributes
The following outlines Tennessee’s chosen predictive attributes used to generate Optimal Fit SPF groupings for segments:
Urban/Rural & Functional Class - Consolidated
Rural Arterial
Rural Collector
Rural Freeway or Expressway
Rural Interstate
Rural Local
Urban Arterial
Urban Collector
Urban Freeway or Expressway
Urban Interstate
Urban Local
Median Type
Divided
None
TWLTL
Number of Lanes
1 Lane
2 Lanes
3 Lanes
4 or 5 Lanes
>= 6 Lanes
Requirements for Optimal Fit Creation
Minimum Crashes: 100
Minimum Segments: 20
Intersections: Predictive Attributes
The following outlines Tennessee’s chosen predictive attributes used to generate Optimal Fit SPF groupings for intersections:
Functional Class - Consolidated
Freeway/Expressway
Interstate
Arterial
Collector
Local
# of Approaches
2 or less approaches
3 approaches
4 approaches
5 approaches
6 or more approaches
Updated Divided
Undivided
Divided
Requirements for Optimal Fit Creation
Minimum Crashes: 100
Minimum Segments: 20