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Oklahoma DOT - Key Filters

This article contains a summary of the key filters available in AASHTOWare Safety for Oklahoma DOT.

Greg Olsen avatar
Written by Greg Olsen
Updated over 9 months ago

The table below summarizes several key filters that were present in Safe-T, and their equivalent filters in AASHTOWare Safety.

Safe-T

AASHTOWare Safety Network Screening

Roadway/Region Select

  1. Entire State

  2. County

  3. City Street

  4. Division

  5. City

  6. County Road

  7. Troop

  8. Control Section

  9. Draw Area on Map

  10. Metro

  11. Hwy/Hwy Jct

  12. Tribe

Equivalent Filters:

  1. Apply no filter

  2. County (Geo) (Segments)

  3. Highway Class = City Street

  4. Maintenance Divisions (Geo) (Segments)

  5. City (Geo) (Segments)

  6. Highway Class = County Road

  7. Collision Troop

  8. Control Section (Segments)

  9. Polygon Filter / Marker Tool


  10. ​

  11. Highway Class = ODOT Highway/OTA Highway

  12. Tribal

Date Select

“Collision Date & Time”

Reports Sections

  1. Basic

  2. Collision Analysis

  3. Sliding Scale Analysis

    1. Maximum Window Lenth (0.0 = Intersection)

    2. For Windows to

    3. Number of Windows

      1. Top #

      2. By Threshold X%

  4. Concentration Listing


  1. ​


  2. ​

  3. Sliding Window Analysis


  4. ​

Rank By

  1. Severity Index

  2. Severity Rate

  3. Expected Collisions

    1. Number of Expected Collisions

    2. Expected Crash Frequency

    3. Expected Crash Density

    4. Expected Crash Rate

    5. Expected Excess Crash Frequency

    6. Typical Crash Frequency

    7. Expected/Typical Crash Ratio

    8. Deviation Probability

Ranking Criteria:

  • Crashes

  • Fatal Crashes

  • Crashes Per Mile

  • ePDO

  • Expected Crash Rate (EB)

  • Expected Crashes (EB)

  • Predicted Crash Rate (SPF)

  • Predicted Crashes (SPF)

  • Predicted Crashes Per Mile (SPF)

  • PSI Potential

  • PSI Potential Per Mile

  • PSI Potential Rate

Filter Collisions

  1. Roadway Type

    1. All Collision Data

    2. Hwy. Data Only

    3. City St. Data Only

    4. County Rd. Data Only
      ​
      ​
      ​

  2. Common Fields

    1. Collision Severity

    2. Unsafe Unlawful (Any Units)

    3. Harmful Events for Collision

    4. Number of Vehicles

    5. Special Features (Inclusion)

    6. Special Features (Exclusion)

    7. Type of Collision

    8. Roadway Departure

Filters

  1. Highway Class =

    1. (leave the filter out, and all data will be displayed

    2. ODOT Highway and OTA Highway

    3. City Street

    4. County Road

    1. Crash Severity

    2. Unsafe / Unlawful (consolidated)

    3. First Harmful Event / Most Harmful Event

    4. # of total vehicles (Crash Level)

    5. All Special Feature

    6. All Special Feature ≠

    7. Manner of Collision

    8. All Events

      1. Select characteristics

General Options

  1. Intersection Related Only

  2. CMV Collisions Only

  3. Include All Crashes Associated with Every Intersection and Interchange

  4. Terminal Locations Only Within Interchanges

  5. Cross Centerline

  6. Exclude Intersection Related

Filters

  1. Intersection Related = Yes

  2. CMV Related

  3. SWA includes all crashes, Segments only includes midblock, intersections only includes intersections


  4. ​


  5. ​

  6. Intersection Related = No

SPF Selection

  1. Target SPFs (essentially the roadway characteristics.

SPFs are applied to each roadway by default. A screening can then be done across diverse roadway types, allowing for a more accurate metric of comparison.

AASHTOWare Safety Network Screening allows you to select the roadways you would like to analyze, and the appropriate SPFs will be utilized in any Predicted or Expected ranking criteria.

Roadway Fields

  1. Highway Class

  2. National Functional Class

  3. Access Control

  4. Medial Width

  5. Outer Shoulder Width

  6. Road Grade (Any Units)

  7. AADT

  8. Number of Lanes

  9. Median Type

  10. Outer Shoulder Type

  11. Traffic Control (any Units)

  12. Road Alignment (any units)
    ​
    ​

  13. Trafficway (any units)

  14. Surface Type (any units)

  15. Speed Limit

  16. Traffic Signal

  17. Terrain Area Type

Filter

  1. Highway Class

  2. Functional Class

  3. Signal Control

  4. Median Width


  5. ​

  6. Road Grade

  7. AADT (Segments)

  8. Lanes (Segments)

  9. Median Type

  10. Outside Shoulder

  11. Traffic Control

  12. Road Character - Horizontal Alignment


  13. ​

  14. Surface Type

  15. Speed Limit (Segments)

  16. Traffic Signal

  17. Terrain Type (Segments)

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