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 Ohio’s chosen predictive attributes used to generate Optimal Fit SPF groupings for segments:
Urban/Suburban/Rural
Rural
Suburban
Urban
Subgroup Type
Freeway_Rural_2lane
Freeway_Rural_4lane
Freeway_Rural_4lane_InterchangeArea
Freeway_Rural_6lane
Freeway_Rural_6lane_InterchangeArea
Freeway_Rural_Multilane_Divided
NonFreeway_Rural_2lane
NonFreeway_Rural_Multilane_Divided
NonFreeway_Rural_Multilane_Undivided
NonFreeway_Rural_OneWay
Freeway_Suburban_2lane
Freeway_Suburban_Multilane_Divided
Freeway_Suburban_Multilane_Undivided
Freeway_Suburban_OneWay
NonFreeway_Suburban_2lane
NonFreeway_Suburban_Multilane_Divided
NonFreeway_Suburban_Multilane_Undivided
NonFreeway_Suburban_OneWay
Freeway_Urban_2lane
Freeway_Urban_4lane
Freeway_Urban_4lane_InterchangeArea
Freeway_Urban_6lane
Freeway_Urban_6lane_InterchangeArea
Freeway_Urban_8+lane
Freeway_Urban_8+lane_InterchangeArea
Freeway_Urban_Multilane_Divided
Freeway_Urban_Multilane_Undivided
Freeway_Urban_OneWay
Freeway_Urban_under4lane
NonFreeway_Urban_2lane
NonFreeway_Urban_Multilane_Divided
NonFreeway_Urban_Multilane_Undivided
NonFreeway_Urban_OneWay
Crash Attribute
All Crashes
Fatal & All Injury
Requirements for Optimal Fit Creation
Minimum Crashes: 100
Minimum Segments: 50
Intersections: Predictive Attributes
The following outlines Ohio’s chosen predictive attributes used to generate Optimal Fit SPF groupings for intersections:
Urban/Suburban/Rural
Rural
Suburban
Urban
Agency Site Subtype
Divided Rural All Way Stop 3-Leg
Divided Rural All Way Stop, All Way With Flasher 4-Leg
Divided Rural No Control, Yield, Two Way Stop, Two Way With Flasher 3-Leg
Divided Rural No Control, Yield, Two Way Stop, Two Way With Flasher 4-Leg
Divided Rural Signal 3-Leg
Divided Rural Signal 4-Leg
Rural Roundabout 2+ Lanes 4-Leg
Rural Roundabout Single Lane 3-Leg
Rural Roundabout Single Lane 4-Leg
Undivided Rural All Way Stop, All way with Flasher 3-Leg
Undivided Rural All Way Stop, All way with Flasher 4-Leg
Undivided Rural Control 5-Leg
Undivided Rural No Control 5-Leg
Undivided Rural No Control, Yield, Two Way Stop, Two Way With Flasher 3-Leg
Undivided Rural No Control, Yield, Two Way Stop, Two Way With Flasher 4-Leg
Undivided Rural Signal 3-Leg
Undivided Rural Signal 4-Leg
Undivided Rural Yield 3-Leg
Undivided Rural Yield 4-Leg+
Divided Urban All Way Stop, All Way With Flasher 3-Leg
Divided Urban All Way Stop, All Way With Flasher 4-Leg
Divided Urban No Control, Yield, Two Way Stop, Two Way With Flasher 3-Leg
Divided Urban No Control, Yield, Two Way Stop, Two Way With Flasher 4-Leg
Divided Urban Signal 3-Leg
Divided Urban Signal 4-Leg
Undivided Urban All Way Stop, All Way With Flasher 3-Leg
Undivided Urban All Way Stop, All Way With Flasher 4-Leg
Undivided Urban Control 5-Leg
Undivided Urban No Control 5-Leg
Undivided Urban No Control, Yield, Two Way Stop, Two Way With Flasher 3-Leg
Undivided Urban No Control, Yield, Two Way Stop, Two Way With Flasher 4-Leg
Undivided Urban Signal 3-Leg
Undivided Urban Signal 4-Leg
Undivided Urban Yield 3-Leg
Undivided Urban Yield 4-Leg
Urban Roundabout 2+ Lanes 3-Leg
Urban Roundabout 2+ Lanes 4-Leg
Urban Roundabout Single Lane 3-Leg
Urban Roundabout Single Lane 4-Leg
Crash Attribute
All Crashes
Fatal & All Injury
Requirements for Optimal Fit Creation
Minimum Crashes: 100
Minimum Intersections: 50