1. Data Driven Safety Analysis in the Project Development Process: State Practices
Integrating Safety Performance into ALL Highway Investment Decisions

2. Safety Analysis in Project Development Peer ExchangesDC
Federal
Lands
Puerto Rico

3. Every Day Counts Data-Driven Safety Analysis Initiative
Goal: Integrate safety performance into ALL highway investment decisions

4. The Project Development Process

5. Safety Analysis in Project Development: Determining Appropriate Level of Analysis
VA: Traffic Operations & Safety Analysis Manual
OR: Analysis Procedures Manual
FHWA: Scale and Scope of Safety Analysis Methods in the Project Development Process (coming soon)

6. Safety Analysis in Planning and Scoping

7. Safety Analysis Applications in Planning and Scoping
IL: Safer Road Index in Project Prioritization and Scoping
CO: Transportation Safety Management and Operations Evaluations Supporting Design Scoping Reviews

8. Case Study: Illinois DOT Safer Road Index & Performance Metrics
Evaluation pavement condition and safety together to prioritize projects
Condition Rating System (CRS) – Structural: Loss of load carrying capacity or structural breakdown
International Roughness Index (IRI) – Functional/Surface: Excessive roughness impacting functional usability and causing drive discomfort
Safer Roads Index (SRI) – Safety Performance (PSI): Establishes safety risk based on historical severe crashes and exposure
State of Repair
CRS Range
9.0 to 7.6
Excellent
7.5 to 6.1
Good
6.0 to 4.6
Fair
4.5 to 1.0
Poor
IRI Range (in/mi)
1 to 94
95 to 177
> 177
SRI Range
Minimal
Low
Minor
Medium
Moderate
High
Severe 5%
Credit: IL DOT

9. Case Study: Illinois DOT Safer Road Index & Performance Metrics
Ranked from High to Low
Credit: IL DOT

10. Case Study: Illinois DOT Safer Road Index & Performance Metrics
Legend
Credit: IL DOT

11. Safety Analysis for ALL Projects

12. Safety Analysis in Alternatives/Environmental Analysis

13. Safety Analysis Applications in Alternatives/Environmental Analysis
MN: Trunk Highway 371
OH: I-270/US 33 Interchange

14. Minnesota Trunk Highway 371
Name
Description
Total Crashes
Segment Crashes
Intersection Crashes
Injury Crashes
PDO Crashes
Existing
(HSM Prediction)
As predicted by the Highway Safety Manual
60.4
32.8
27.6
19.9
40.5
Alterative 1
Do Nothing, 2030 Traffic Volumes
103.9
77.2
26.7
34.4
69.5
Alternative 2
4 Lane on the existing alignment
66.7
48.7
18.0
27.2
39.5
Alternative 3
4 Lane on the existing alignment with the Pequot Lakes bypass with Traffic Signal
88.1
50.5
37.6
36.5
51.6
Alternative 3 (Modified)
4 Lane on the existing alignment with the Pequot Lakes bypass with Interchange
80.9
30.4
34.0
46.9
Alternative 4
4 Lane on the existing alignment with the Pequot Lakes and Jenkins Bypass with Traffic Signals
99.3
50.3
49.0
41.5
57.8
Alternative 4 (Modified)
4 Lane on the existing alignment with the Pequot Lakes and Jenkins Bypass with Interchanges
88.2
37.9
37.3
50.9
Alternative 5
4 Lane on the existing alignment with the Jenkins Bypass with Traffic Signal
79.5
29.2
32.5
47.0
Alternative 5 (Modified)
4 Lane on the existing alignment with the Jenkins Bypass with Interchange
75.0
24.7
31.0
44.0

15. Case Study: I-270/US 33 Interchange, Dublin OH
Three of eight interchange alternatives were developed and analyzed based on a list of criteria:
Traffic Operations
Design & Construction
Environmental Impacts
Right-of-Way Needs
Capital Costs
Safety Performance
ISATe

16. Case Study: I-270/US 33 Interchange, Dublin OH
Alternative 8 predicted to have lowest KAB crash frequency and lowest expected societal cost
City of Dublin and ODOT selected Alternative 8 as the preferred alternative based on all of the criteria.
ISATe

17. Safety Analysis in Design

18. Safety Analysis Applications in Design Phase
MO: Safety Analysis Requirement in Design Exception Policy
KS: Performance-Based Practical Design
Selecting design elements/features
Intersection Control Evaluation (ICE)

19. MoDOT’s Design Exception Process - 131.1
In addition, if the design exception request involves safety related features that are adequately addressed in the AASHTO Highway Safety Manual, then documentation of the exception should include a safety analysis as described in the manual.

20. Kansas DOT K-177 Modernization Project

21. Every Day Counts Data-Driven Safety Analysis Initiative
Goal: Integrate safety performance into ALL highway investment decisions