FSITE Annual Meeting October 31, 2018 Safety Analyst – The What, Why, and How? Priyanka Alluri , Ph.D., P.E. Assistant Professor Dept. of Civil & Environ. Engineering Florida International University FDOT Champion: Joe Santos, P.E.
Presentation Overview • Roadway Safety Management Process • Safety Analyst • What is Safety Analyst? • Why use Safety Analyst? • What can you do with Safety Analyst? • What is the Safety Analyst data model? • What are the modules and tools within Safety Analyst? • What is FDOT’s progress with Safety Analyst deployment? Safety Analyst ‐ The What, Why, & How? 10/31/2018 2
Roadway Safety Management Process 1 Network Screening 6 2 Safety Effectiveness Diagnosis Evaluation 3 Project Countermeasure Prioritization Selection 5 Economic Appraisal 4 10/31/2018 Safety Analyst ‐ The What, Why, & How? 3
New Safety Analysis Tools Provide state‐of‐the‐art analytical Provide analytical tools and tools for use in the decision‐making techniques for quantifying process to identify and manage a the safety effects of decisions systemwide program of site‐specific made in planning, design, improvements to enhance highway operations, and maintenance safety by cost‐effective means 10/31/2018 Safety Analyst ‐ The What, Why, & How? 4
Safety Analyst Provide state‐of‐the‐art analytical tools for use in the decision‐ making process to identify and manage a systemwide program of site‐specific improvements to enhance highway safety by cost‐effective means. Safety Analyst ‐ The What, Why, & How? 10/31/2018 5
Tools for Safety Management To assist agencies in making better decisions about: • Where to make highway safety improvements? • What improvements to make? • How effective the implemented safety improvements are? Safety Analyst ‐ The What, Why, & How? 10/31/2018 6
Why Use Safety Analyst? • Safety Analyst can proactively determine which sites have the highest potential for safety improvement • Safety Analyst integrates all parts of the roadway safety management process into a single software package • Safety Analyst automates state‐of‐the‐art statistical approaches as described in Part B of the HSM Safety Analyst ‐ The What, Why, & How? 10/31/2018 7
What Can You Do With Safety Analyst? • Identify locations with greatest potential for safety improvement • Perform site‐specific diagnosis to identify crash contributing factors and crash patterns • Select countermeasure(s) • Conduct economic appraisal and prioritize safety improvement projects • Evaluate countermeasures Safety Analyst ‐ The What, Why, & How? 10/31/2018 8
Safety Analyst Capabilities • Automates all the steps in the roadway safety management process • Automatically divides the entire road network into predefined site subtypes • Performs quality control and identifies problems with the data sets • Applies empirical Bayes (EB) method and ranks problematic sites based on their potential for safety improvement • Provides expert system to diagnose site conditions and collision patterns and suggest potential countermeasures Safety Analyst ‐ The What, Why, & How? 10/31/2018 9
Safety Analyst Development Timeline Interim software tools SA is Development are released released of SA began ‘01 ‘02 ‘03 ‘04 ‘05 ‘06 ‘07 ‘08 ‘09 ‘10 SA is evaluated White papers defining the functionality of the software tools are released Safety Analyst ‐ The What, Why, & How? 10/31/2018 10
Safety Analyst Data Model Source: Harwood, D. W., Torbic, D. J., Richard, K. R., & Meyer, M. M. (2010). “SafetyAnalyst: Software Tools for Safety Management of Specific Highway Sites (No. FHWA-HRT-10-063). Midwest Research Institute, Kansas City, MO. Safety Analyst ‐ The What, Why, & How? 10/31/2018 11
Safety Analyst Data Management Tool CREATE DATASET PROFILES IMPORT POST PROCESS CALIBRATE REPORT EXPORT Safety Analyst ‐ The What, Why, & How? 10/31/2018 12
Safety Analyst Administration Tool Federal database Agency database System database Edit data attributes Edit agency site subtypes Edit agency specified user preferences Edit agency countermeasures Edit agency diagnostics data Edit agency specified distribution data Edit agency specified SPF data Edit cost‐related default parameters Edit agency organization information Edit user‐defined administrative preferences Submit a software related problem Safety Analyst ‐ The What, Why, & How? 10/31/2018 13
Safety Analyst Analytical Tool Analytical Tool Framework User Workbook Site list Safety Analyst ‐ The What, Why, & How? 10/31/2018 14
Safety Analyst Modules 1. Network Screening 2. Diagnosis and Countermeasure Selection 3. Economic Appraisal and Priority Ranking 4. Countermeasure Evaluation Safety Analyst ‐ The What, Why, & How? 10/31/2018 15
Data • Roadway Inventory • Crash • Traffic Safety Analyst Administrator Area Data Converter Application Process Safety Analyst Import Files: Data on • Segments, Intersections, Ramps Implemented • Crash Countermeasures • Traffic Safety Analyst Implemented Safety Analyst Safety Analyst Data Safety Analyst Countermeasure Tool Administration Tool Management Tool Network Screening Module Safety Analyst Analytical Tool Diagnostics & Countermeasure Analyst Area Selection Module Economic Appraisal & Priority Ranking Module Countermeasure Evaluation Module Safety Analyst ‐ The What, Why, & How? 10/31/2018 16
FDOT’s Progress with Safety Analyst Deployment • Concern: Safety Analyst has stringent data requirements Solution: A conversion program has been developed to automatically generate Safety Analyst import files. However, the program needs to be updated to include data from non‐state roads. • Concern: Safety Analyst requires Florida‐specific SPFs Solution: Florida‐specific SPFs have been developed to use with Safety Analyst. • Concern: Safety Analyst has steep learning curve Solution: We will provide technical support and expert advice on Safety Analyst. Safety Analyst ‐ The What, Why, & How? 10/31/2018 17
Summary • Roadway safety management is a data‐intensive, statistically complex, and computationally rigorous process. • Safety Analyst automates all the steps in roadway safety management process. • Safety Analyst requires minimum statistical expertise. • Data requirements are intense. However, it is a one‐time process. • Safety Analyst can play an important role so that highway agencies get the greatest possible safety benefit from each safety dollar spent. • Safety Analyst can be used to create safety assessment reports based on rigorous data analysis to secure safety funds and justify their use. Safety Analyst ‐ The What, Why, & How? 10/31/2018 18
Thank You! Priyanka Alluri , Ph.D., P.E. Florida International University 305‐348‐3485; palluri@fiu.edu
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