1 Safety in Planning: Data Needs from a Rural Perspective (Iowa) Traffic Records Forum Session 10 July 2004 Michael D. Pawlovich, Ph.D., P.E. Traffic Safety and Crash Analysis Engineer Office of Traffic and Safety Iowa Dept. of Transportation (see also Session 23, Tom Welch, The Iowa Perspective)

2 How is the Data Used AASHTO-based topics Single-vehicle ROR Milled shoulder rumble strips 4’ paved shoulder policy Offset right-turn lanes Passing lanes More/longer turn lanes Rural, 2-lane corridors Low cost improvements – Curve signs/chevrons – Curve improvements – High crash curve locations Candidate Safety Projects – Paved shoulders – Milled shoulder rumble strips – 2-lane shoulder widening – Severe crash 2-lane, rural roads – High crash curves – Centerline rumble strips – Cross-median, head-on – Severe crash intersections – Expressway intersections – Older driver-oriented improvements – (7 ROR-related) (Session 23, Tom Welch, The Iowa Model)

3 How is the Data Used Vehicle Occupancy Sufficiency System (DOT Planners) Safety Improvement Candidate Locations (SICL) Comparables – road type, VMT/DEV, severity, trends Regional (county) analysis Safety Conscious Planning (Planning, MPOs/RPAs) Corridor Enforcement (GTSB/ISP) Older Drivers (GTSB/MVD/TAS) Problem ID (GTSB) Don’t Veer for Deer (GTSB/SMS) Crash Facts (MVD ODS) School Age Pedestrians Rail Crossings Bridge considerations Workzone training Risk Management & Litigation Winter Maintenance CODES linkages Driver/Licensing Issues/Training (Not necessarily Session 23, other Iowa uses)

4 Available Data GIS-based  LRS in-progress Crash data (point) – 10 years ( ) – MMUCC – Crash, driver, vehicle, injury, workzone, derived, etc. – Timeliness vital – access to 2004 data within Iowa DOT CODES Roadway data (line) – 6 years ( ) – Redesign underway – Geometry, traffic, class, sufficiency, etc. – Vital to planning/safety activities – Curve locations, signals, intersection data, etc. needed County/City/Township/PLSS (polygon) Rail (point & line) River (line) Structures (point) – Bridges, culverts, etc. Enforcement (point) – Citation, criminal, vehicle inspection, OWI – Local

5 Obtaining the Data – Who? Crash retrieval/analysis resources – Iowa Traffic Safety Data Service (ITSDS) – University-based Iowa State (Engineering, Planning, Statistics) –Center for Transportation Research and Education (CTRE) University of Iowa (Public Policy, Medical, Human Factors) –Center for Public Policy –Injury Prevention Center University of Northern Iowa (Geography, Statistics) – Iowa DOT Personnel TAS, Districts, Planners, Location, Design, others – Locals counties, cities, MPOs/RPAs – Consultants TEAP, others

6 Obtaining the Data – How? Crash retrieval/analysis resources – SAVER w/ Collision Diagrams – Crash Mapping Tool (CMaT) - engineering – Incident Mapping Tool (IMaT) - enforcement – Iowa Traffic Safety Data Service (ITSDS) & Center for Transportation Research and Education (CTRE) WWW – comparables, statewide values, county analyses, trends, SICL Traffic Safety Manual development

7 Data Users State Safety Engineer  Tom Welch Planning/Location Public Safety (DPS GTSB/ISP) Driver Services (MVD ODS) Public Health (DPH) Safety Management (SMS)/Traffic Records (STRAC) Significant Collaboration – National/State/Local – Engr/Enf/Planning/Behavior/Health