Presentation Transcript

1. HSM Implementation ToolsSafety Analyst

   Kim Kolody Silverman, PE CH2M HILL representing Illinois Department of Transportation
2. We commonly trade safety off against something else Costs Environment Right-of-Way Safety
3. We’re Interested in Other Impacts for Project Level Decisions – What About Substantive Safety? Construction Plans Cost Models Real estate appraisals DOT databases HCM CORSIM PASSER TRANSYT7F VISSIM Design Criteria (nominal safety) Traffic Noise Model 1.0 CAL3QHC Mobile 5a 3-D Visualization CITYGREEN More quantitative Greater weight HSM Tools Safety Environmental Traffic Right-of-Way Costs Impacts Impacts Operations
4. Tools for Implementing HSM Excel Spreadsheets Interactive Highway Safety Design Model (IHSDM) Safety Analyst
5. HSM Excel Spreadsheets Project level basis Simple, straightforward Limited data required
6. Interactive Highway Safety Design Model Provides expected safety, operational performance HSM techniques + Modules to compare design to standards Requires detailed data input Free
7. The Vision of SafetyAnalyst – Software Akin to the HCS+ 1 2 3
8. Purpose of SafetyAnalyst SafetyAnalyst provides state-of-the-art tools for safety management that provide capabilities beyond those currently available to highway agencies Effectiveness of decision making Efficiency of decision support
9. Intended for those who will: Identify candidate sites for safety improvements Investigate the types of safety improvements needed for specific sites Assess whether specific safety improvements are economically justified and should be programmed Evaluate the safety effectiveness of implemented projects
10. Road Safety Management Process
11. Network Screening Module 1 Network Screening Review highway network (or any portion of the network) to identify sites with potential for safety improvement Identify sites that are candidates for further investigation 6 different methods for screening
12. Module 2 Diagnosis & Countermeasure Selection Helps to identify accident patterns of interest at specific sites Guides user in the diagnosis of safety problems at specific sites Suggests countermeasures that address identified accident patterns of interest Lets user select appropriate countermeasures
13. Module 3 Perform economic analysis of alternative countermeasures for a specific site Perform economic analysis of countermeasures across selected sites Select mix of sites and countermeasures to maximize benefits within a given budget Develop priority ranking of alternative improvements Economic Appraisal & Prioritization
14. Module 4 – Countermeasure Evaluation Conduct before-after evaluations of implemented countermeasures Quantify the safety effectiveness of implemented countermeasures based on: Percent change in accident frequency Change in proportion of target accidents Safety Effectiveness Evaluation
15. Test Data Input for Illinois
16. Data Process for Illinois 3.5 hours for data import 15 minutes for crash data script 2.5 hours for post processing 15 minutes for calibration Total = 6.5 hours for approximately 5% of total data set
17. Challenges Data input and processing takes some time Requires user training Requires agency support Cost
18. Challenges Data Input and Processing Coordinate multiple data sources, data owners Determining business rules Complete data where not available Data input (SQL vs Oracle) Data set-up process time Network screening process time
19. Benefits Powerful analysis tool Automates HSM procedures Calibrates nationaldefault SPFs Screen large amounts of data Provides consistent evaluation and results for decision making
20. Benefits Flexible for user Countermeasures, service life, costs included Automates various economic comparisons Set of tools that allows for a better selection of sites and improved prioritization techniques for decision making to maximize resources to reduce severe crashes
21. Benefits Forces coordination between divisions of the agency Better data More data Understanding of data application across the agency which may influence potential changes in agencybusiness practices
22. HSM Implementation Tool: Recommendations Use HSM Excel Spreadsheets where appropriate Apply IHSDM where appropriate Start preparing Safety Analyst for use
23. HSM Implementation Tool: Safety Analyst Recommendations Determine funding options Start the process of data identification, mapping Start educating staff at central office Engage IT staff
24. HSM Implementation Tool: Safety Analyst Recommendations Start with a small test data set Good team coordination Decision making in data set-up Seek assistance from AASHTO, peers
25. For more information Highway Safety Manual http://www.highwaysafetymanual.org/ Safety Analyst http://www.safetyanalyst.org/ Interactive Highway Safety Design Model http://www.tfhrc.gov/safety/ihsdm/ihsdm.htm
26. Questions Kim Kolody, PE CH2M HILL (773) 458.2883 Kim.Kolody@ch2m.com kolodyka@illinois.gov Priscilla Tobias, PE State Safety Engineer Illinois Department of Transportation (217) 782-3568 priscilla.tobias@illinois.gov