AASHTOAASHTO

Safety Data Systems Task GroupSafety Data Systems Task Group

Tom Welch, PETom Welch, PEState Traffic Safety EngineerState Traffic Safety EngineerIowa Dept. of Trans., Traffic and SafetyIowa Dept. of Trans., Traffic and SafetyTom.Welch@dot.iowa.govTom.Welch@dot.iowa.gov

AASHTOAASHTO||

Standing Committee on Highway Traffic Standing Committee on Highway Traffic SafetySafety

||Subcommittee on Safety ManagementSubcommittee on Safety Management

||Task GroupsTask Groups

Task GroupsTask Groups

I.I. Technical Information and ResourcesTechnical Information and Resources

II.II. At Risk Roadway UsersAt Risk Roadway Users

III.III. Strategic Highway Safety PlansStrategic Highway Safety Plans

IV.IV. Safety Data Systems & AnalysisSafety Data Systems & Analysis

V.V. Safety Information PackagesSafety Information Packages

VI.VI. ResearchResearch

IV – Safety Data Systems & IV – Safety Data Systems & AnalysisAnalysis

Tom Welch - IA (Chair)Tom Welch - IA (Chair)Kevin Lacy – NC (Vice Chair)Kevin Lacy – NC (Vice Chair)Mike Staggs – FHWA LiaisonMike Staggs – FHWA LiaisonRick Pain – TRBRick Pain – TRB

Chuck Reider – NVChuck Reider – NVSean Hiraoka – HISean Hiraoka – HIDale Lighthizer – MIDale Lighthizer – MIBrett Harrelson – SCBrett Harrelson – SCDouglas Bish – ORDouglas Bish – ORMichael Curtit – MOMichael Curtit – MOVernon Betkey – MDVernon Betkey – MDJim Willis – MSJim Willis – MSDavid Beach – UTDavid Beach – UTDan Magri – LADan Magri – LAMarsha Ways – WVMarsha Ways – WVMichael Sandoval – NMMichael Sandoval – NMJennifer Townley – OHJennifer Townley – OHCindy Cashen – AKCindy Cashen – AKBrad Foley – MEBrad Foley – MEMichael Pawlovich - IAMichael Pawlovich - IA

IV – Safety Data Systems & IV – Safety Data Systems & AnalysisAnalysis

To support and enhance all safety management To support and enhance all safety management support systems, the assessment of common needs, support systems, the assessment of common needs, definition of requirements, and definition of requirements, and development/implementation of new solutions development/implementation of new solutions through the AASHTOWare Program, if appropriate.through the AASHTOWare Program, if appropriate.

Develop/distribute crash reduction factors and safety Develop/distribute crash reduction factors and safety training manuals, identify successful training manuals, identify successful countermeasures, and develop accurate and current countermeasures, and develop accurate and current traffic records systems. These efforts will help traffic records systems. These efforts will help support the implementation of states’ SHSPs.support the implementation of states’ SHSPs.

Background MaterialBackground Material

SAFETEA-LU allocated $1M (after SAFETEA-LU allocated $1M (after reductions) to AASHTO to develop a reductions) to AASHTO to develop a successor to the TSIMS project (needs successor to the TSIMS project (needs match)match)

AASHTO and AASHTOWare were not AASHTO and AASHTOWare were not making a software proposalmaking a software proposal

Asking Task Group to consider how Asking Task Group to consider how AASHTO might serve the membershipAASHTO might serve the membership

Task Force ResponseTask Force Response

No Interest in TSIMS-like data management No Interest in TSIMS-like data management and analysis toolsand analysis tools

Most states have data repositoryMost states have data repository Not feasible or prudent as each state Not feasible or prudent as each state

has unique existing systemshas unique existing systems Very difficult to gain consensus on data Very difficult to gain consensus on data

analysis toolsanalysis tools

Summary of Task ForceSummary of Task ForceDiscussion and ActionDiscussion and Action

Design for basic data model/database Design for basic data model/database infrastructureinfrastructure

GIS-based analysis tool for local agenciesGIS-based analysis tool for local agencies CRFs websiteCRFs website Workforce development and trainingWorkforce development and training Synthesis of practice for officer training and Synthesis of practice for officer training and

crash reportingcrash reporting Data collection synthesis of best practiceData collection synthesis of best practice

State DOT Data Gap NeedsState DOT Data Gap Needs

Local road crash dataLocal road crash data Locating crashesLocating crashes Data quality/edit processesData quality/edit processes

Macro/Annual QCMacro/Annual QC Micro/case-by-caseMicro/case-by-case

Data Collection SynthesisData Collection Synthesis

Location referencing (GPS vs. linear Location referencing (GPS vs. linear referencing)referencing)

Data validation at the point of entry Data validation at the point of entry and/vs during post-processing of dataand/vs during post-processing of data

Preferred form factor of the electronic Preferred form factor of the electronic data gathering devicedata gathering device

Web applications and/vs PC Web applications and/vs PC applicationsapplications

Data Collection SynthesisData Collection Synthesis

Wireless applicationsWireless applications Data for data between agenciesData for data between agencies Data linkages (spatial and/or Data linkages (spatial and/or

attribute/key field)attribute/key field) Local law enforcement data usesLocal law enforcement data uses Central crash data repository Central crash data repository

access/provision for access/provision for distribution/disseminationdistribution/dissemination

GIS-based analysis toolGIS-based analysis toolfor local agenciesfor local agencies

Simple, basic toolSimple, basic tool GIS-basedGIS-based Simple, straightforward linkage to Simple, straightforward linkage to

existing state data formatsexisting state data formats Availability throughout a variety of user Availability throughout a variety of user

levelslevels Consideration of expandabilityConsideration of expandability

Training NeedsTraining Needs

New TRB Task Force on Road Safety New TRB Task Force on Road Safety Workforce DevelopmentWorkforce Development

AASHTO Task Group Input:AASHTO Task Group Input: Safety Engineering courses:Safety Engineering courses:

Local agenciesLocal agencies National 2-3 week new safety engineers National 2-3 week new safety engineers

coursecourse

FHWA Crash Reduction Factors FHWA Crash Reduction Factors (CRF) Field Guide(CRF) Field Guide

PURPOSE The purpose of this task is to compile a

set of accident modification factors (AMFs) for safety and traffic engineering practitioners. There is also a request for crash reduction factors (CRFs) to be added to the list.

CRF Field GuideCRF Field Guide

Step 1. Create a List of Treatments or Countermeasures

The iTRANS/VHB team will create a list of treatments grouped by the crash types of intersection, roadway departure, and pedestrian.

CRF Field GuideCRF Field GuideStep 2. Gather Sources for Accident Modification Factors

The Highway Safety Manual (HSM) as part of NCHRP Project 17-27 collected and reviewed over 600 publications, which will are available to the iTRANS/VHB team.

Some of the additional publications already proposed to the Team will include:

Research Results Digest (RRD) 299: Crash Reduction Factors for Traffic Engineering and Intelligent Transportation System (ITS) Improvements: State-of-Knowledge Report

Kentucky Transportation Cabinet Report KTC-96-13: Development of Accident Reduction Factors

Engineering Countermeasures to Reduce Red-Light Running, FHWA/TX-03/4027-2, August 2002, TTI

Hovey, P.W.; Chowdhury, M.; "Development of Crash Reduction Factors" Prepared for Ohio DOT, September 2005

Bonneson, J.; Zimmerman, K.; Fitzpatrick, K.; "Roadway Safety Design Synthesis" Texas Transportation Institute for Texas DOT, November 2005

CRF Field GuideCRF Field GuideIn order to have the latest and most complete list of AMFs, the

iTRANS/VHB Team will coordinate with the following NCHRP projects to request for relevant interim materials.

NCHRP Project 17-26, Methodology to Predict the Safety Performance of Urban and Suburban Arterials (HSM Part III, Chapter 9).

NCHRP Project 17-29, Methodology to Predict the Safety Performance of Rural Multilane Highways (HSM Part III, Chapter 10).

The TRB HSM Task Force is revisiting the SPFs and AMFs developed by Harwood et al. for IHSDM (2000) for rural two-lane roads (HSM Part III, Chapter 8).

NCHRP 17-35 Evaluation of Safety Treatments at Signalized Intersections.

CRF Field GuideCRF Field Guide

AMF Selection Guidance

Only AMFs which are both precise and accurate should be included in the published deliverables. The NCHRP 17-27 project has developed a “decision rule” in order to determine the acceptability of AMFs for inclusion in the first edition of the HSM.

CRF Field GuideCRF Field Guide

DELIVERABLES

The following deliverables will be developed as part of this task:

Updated text for joint FHWA/ITE Publication Intersection Safety Issue Brief Number 5: Traffic Signals in a camera-ready format.

Updated text for joint FHWA/ITE Publication Intersection Safety Issue Brief Number 8: Toolbox of Countermeasures and Their Potential Effectiveness to Make Intersections Safer in a camera-ready format.

Field Guides with AMFs (and CRFs) for treatments divided in terms of crash types, i.e., roadway departure, intersection, and pedestrian in a camera-ready format.

CRF Field GuideCRF Field Guide

DELIVERABLES

Scanned AMF reference materials in an electronic version (CD or DVD).

A 45-minute PowerPoint presentation describing the project and findings complete with speaker notes

New text for a Roadway and Lane Departure Safety Issue Brief in a camera-ready format.

New text for a Pedestrian Safety Issue Brief in a camera-ready format.

CRF Field GuideCRF Field Guide

SCHEDULE

It is expected that the work will commence in January 2007 and be completed by Mid-July 2007.

CONTACT

Clayton Chen, FHWA

Next StepsNext Steps

Submit Synthesis of Practice on Data Collection

Submit GIS-based Analysis Tool AASHTOWare Proposal

Complete FHWA CRF Field Guide