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 Utah’s chosen predictive attributes used to generate Optimal Fit SPF groupings for segments:
Roadway Type
Divided Protected Rural 1 Lanes Interstate
Divided Protected Rural 1 Lanes Non-Interstate
Divided Protected Rural 2 Lanes + 1 Passing Interstate
Divided Protected Rural 2 Lanes + 2 Passing Non-Interstate
Divided Protected Rural 2 Lanes Interstate
Divided Protected Rural 2 Lanes Non-Interstate
Divided Protected Rural 3 Lanes + 1 Passing Interstate
Divided Protected Rural 3 Lanes Interstate
Divided Protected Rural 3 Lanes Non-Interstate
Divided Protected Rural 4 Lanes Interstate
Divided Protected Rural 4 Lanes Non-Interstate
Divided Protected Urban Non-Interstate
Divided Protected Urban 1 Lanes Interstate
Divided Protected Urban 1 Lanes Non-Interstate
Divided Protected Urban 2 Lanes + 1 Passing Interstate
Divided Protected Urban 2 Lanes Interstate
Divided Protected Urban 2 Lanes Non-Interstate
Divided Protected Urban 3 Lanes + 1 Passing Interstate
Divided Protected Urban 3 Lanes Interstate
Divided Protected Urban 3 Lanes Non-Interstate
Divided Protected Urban 4 Lanes Interstate
Divided Protected Urban 4 Lanes Non-Interstate
Divided Protected Urban 5 Lanes + 1 Passing Interstate
Divided Protected Urban 5 Lanes Interstate
Divided Protected Urban 5 Lanes Non-Interstate
Divided Protected Urban 6 Lanes Interstate
Divided Protected Urban 6 Lanes Non-Interstate
Divided Protected Urban 7 Lanes Interstate
Divided Protected Urban 7 Lanes Non-Interstate
Divided Protected Urban 8 Lanes Non-Interstate
Divided Unprotected Rural 1 Lanes Interstate
Divided Unprotected Rural 2 Lanes + 1 Passing Interstate
Divided Unprotected Rural 2 Lanes Interstate
Divided Unprotected Rural 2 Lanes Non-Interstate
Divided Unprotected Rural 3 Lanes + 1 Passing Non-Interstate
Divided Unprotected Rural 3 Lanes Interstate
Divided Unprotected Urban 1 Lanes Interstate
Divided Unprotected Urban 1 Lanes Non-Interstate
Divided Unprotected Urban 2 Lanes + 1 Passing Interstate
Divided Unprotected Urban 2 Lanes Interstate
Divided Unprotected Urban 2 Lanes Non-Interstate
Divided Unprotected Urban 3 Lanes Interstate
Divided Unprotected Urban 3 Lanes Non-Interstate
Divided Unprotected Urban 4 Lanes Interstate
Divided Unprotected Urban 4 Lanes Non-Interstate
Divided Unprotected Urban 5 Lanes Interstate
No Median/Undivided Rural Non-Interstate
No Median/Undivided Rural 0 Lanes Interstate
No Median/Undivided Rural 0 Lanes Non-Interstate
No Median/Undivided Rural 1 Lanes Interstate
No Median/Undivided Rural 1 Lanes Non-Interstate
No Median/Undivided Rural 2 Lanes + 1 Passing Non-Interstate
No Median/Undivided Rural 2 Lanes + 2 Passing Non-Interstate
No Median/Undivided Rural 2 Lanes Interstate
No Median/Undivided Rural 2 Lanes Non-Interstate
No Median/Undivided Rural 3 Lanes + 1 Passing Non-Interstate
No Median/Undivided Rural 3 Lanes Non-Interstate
No Median/Undivided Rural 4 Lanes Non-Interstate
No Median/Undivided Urban Non-Interstate
No Median/Undivided Urban 0 Lanes Non-Interstate
No Median/Undivided Urban 1 Lanes Interstate
No Median/Undivided Urban 1 Lanes Non-Interstate
No Median/Undivided Urban 2 Lanes + 1 Passing Non-Interstate
No Median/Undivided Urban 2 Lanes Interstate
No Median/Undivided Urban 2 Lanes Non-Interstate
No Median/Undivided Urban 3 Lanes + 1 Passing Non-Interstate
No Median/Undivided Urban 3 Lanes Interstate
No Median/Undivided Urban 3 Lanes Non-Interstate
No Median/Undivided Urban 4 Lanes Interstate
No Median/Undivided Urban 4 Lanes Non-Interstate
No Median/Undivided Urban 5 Lanes Non-Interstate
No Median/Undivided Urban 6 Lanes Non-Interstate
No Median/Undivided Urban 7 Lanes Non-Interstate
No Median/Undivided Urban 8 Lanes Non-Interstate
No Median/Undivided Urban 9 Lanes Non-Interstate
Not Available Interstate
Not Available Non-Interstate
Raised Median Rural 2 Lanes Non-Interstate
Raised Median Urban 1 Lanes Non-Interstate
Raised Median Urban 2 Lanes Non-Interstate
Raised Median Urban 3 Lanes Non-Interstate
Raised Median Urban 4 Lanes Non-Interstate
Raised Median Urban 5 Lanes Non-Interstate
Raised Median Urban 6 Lanes Non-Interstate
Raised Median Urban 7 Lanes Non-Interstate
Raised Median Urban 8 Lanes Non-Interstate
Two-Way Left-Turn Lane Rural 2 Lanes + 1 Passing Non-Interstate
Two-Way Left-Turn Lane Rural 2 Lanes + 2 Passing Non-Interstate
Two-Way Left-Turn Lane Rural 2 Lanes Non-Interstate
Two-Way Left-Turn Lane Rural 3 Lanes + 1 Passing Non-Interstate
Two-Way Left-Turn Lane Rural 3 Lanes Non-Interstate
Two-Way Left-Turn Lane Rural 4 Lanes Non-Interstate
Two-Way Left-Turn Lane Urban 2 Lanes + 1 Passing Non-Interstate
Two-Way Left-Turn Lane Urban 2 Lanes Non-Interstate
Two-Way Left-Turn Lane Urban 3 Lanes Non-Interstate
Two-Way Left-Turn Lane Urban 4 Lanes Non-Interstate
Two-Way Left-Turn Lane Urban 5 Lanes Non-Interstate
Two-Way Left-Turn Lane Urban 6 Lanes Non-Interstate
Two-Way Left-Turn Lane Urban 7 Lanes Non-Interstate
Two-Way Left-Turn Lane Urban 8 Lanes Non-Interstate
Requirements for Optimal Fit Creation
Minimum Crashes: 100
Minimum Segments: 50
Intersections: Predictive Attributes
The following outlines Utah’s chosen predictive attributes used to generate Optimal Fit SPF groupings for intersections:
Roadway Type
3-Leg Minor Stop Not Available
3-Leg Minor Stop Rural
3-Leg Minor Stop Urban
3-Leg Signal Not Available
3-Leg Signal Rural
3-Leg Signal Urban
4+ Leg Minor Stop Not Available
4+ Leg Minor Stop Rural
4+ Leg Minor Stop Urban
4+ Leg Signal Not Available
4+ Leg Signal Rural
4+ Leg Signal Urban
Active Transportation Rural
Active Transportation Urban
All Way Stop Not Available
All Way Stop Rural
All Way Stop Urban
CFI Central Not Available
CFI Central Urban
CFI Offset Left Urban
DDI Urban
Other Not Available
Other Rural
Other Urban
Railroad Rural
Railroad Urban
Roundabout Not Available
Roundabout Rural
Roundabout Urban
SPUI Rural
SPUI Urban
Thru Turn Not Available
Thru Turn U Urban
Thru Turn Urban
Uncontrolled Not Available
Uncontrolled Rural
Uncontrolled Urban
Yield Not Available
Yield Rural
Yield Urban
Requirements for Optimal Fit Creation
Minimum Crashes: 100
Minimum Segments: 50