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 Nebraska’s chosen predictive attributes used to generate Optimal Fit SPF groupings for segments:
Rural/Urban City Limits
Rural
Urban
Number of Lanes
2-Lane
Multi-Lane
One-Way/Two-Way
One-Way
Two-Way
Interstate/Expressway/Other Roadway
Expressway
Interstate
Other Roadway
Surfaced Shoulder
With Surfaced Shoulder
Without Surfaced Shoulder
Requirements for Optimal Fit Creation
Minimum Crashes: 100
Minimum Segments: 50
Intersections: Predictive Attributes
The following outlines Nebraska’s chosen predictive attributes used to generate Optimal Fit SPF groupings for intersections:
Number of Legs
2-Leg
3-Leg
4-Leg
5-Leg
6-Leg
7-Leg
8-Leg
9-Leg
10-Leg
Rural/Urban City Limits
Rural
Urban
Major-Leg National Functional Class
Local Roadway
Major Collector
Minor Arterial
Minor Collector
Other Principal Arterial
Requirements for Optimal Fit Creation
Minimum Crashes: 100
Minimum Segments: 50