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Minnesota Crash Mapping Analysis Tool (MnCMAT) & Crash Data

Minnesota Crash Mapping Analysis Tool (MnCMAT) & Crash Data. Mark Vizecky (Va-Sis-Ski) State Aid for Local Transportation Program Support Engineer. Sulmaan Khan State Aid for Local Transportation Assistant Project Development Engineer. March 2012. Agenda. Welcome - Introductions

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Minnesota Crash Mapping Analysis Tool (MnCMAT) & Crash Data

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  1. Minnesota Crash Mapping Analysis Tool(MnCMAT) & Crash Data Mark Vizecky (Va-Sis-Ski) State Aid for Local Transportation Program Support Engineer Sulmaan Khan State Aid for Local Transportation Assistant Project Development Engineer March 2012

  2. Agenda • Welcome - Introductions • Sources of Crash Data • Crash Detail Levels • Methods of Retrieval • Transportation Information System (TIS) (Gen 1) • Excel Spreadsheet (Gen 2) • MnCMAT (Gen 3) • Overview • Case Studies • Demonstration • Analyzing the Data • Green Sheets • Top 200 Intersection/Top 150 Sections • Rates vs Density • Traffic Engineering Fundamentals Handbook • Wrap-up

  3. Data Source and Criteria • Sources • Police Accident Report • Paper • Electronic • Citizen (public) Report • Paper • Electronic • Criteria (D-16 manual) • Fatality, Injury or Property Damage >$1,000 • Roadway open to the public • Death must be within 30 days for fatality • Intentional and medical caused NOT counted http://www.dot.state.mn.us/stateaid/crash-flowchart.html

  4. Police Accident Report (PAR) Overlay Report

  5. Police Accident Report (PAR) Overlay (Front) Overlay (Back)

  6. Citizen Accident Report Report (Front) Report (Back)

  7. D-16 Manual “…promote uniformity and comparability of motor vehicle traffic statistics..” http://downloads.nsc.org/pdf/D16.1_Classification_Manual.pdf

  8. D-16: Sample (53 pages)

  9. Model Minimum Uniform Crash Criteria (MMUCC) “…provide a minimum, standardized data set for describing crashes of motor vehicles..” http://www.mmucc.us/

  10. A Crash is NOT a simple event…. PERSON LEVEL CRASH LEVEL VEHICLE LEVEL

  11. Importance of Data Elements (Top 3) • Education • County/city location • Seat belt usage • Drinking • Enforcement • Corridor location • Time of day • Day of week • Engineering • Location • Location • Location

  12. Crash Level data elements • Location • Route System • Route Number • Reference point • (nnn+00.111 is wild guess) • Interchange element • Reliability • Numbers = DPS only, Alpha = MnDOT • 1 or A – Confident (within feet) • 2 or B – Less confident (within .25 mi) • 3 or C - Best guess (within 1 mile) • 4 or D - Wild guess (within county or city) • City • County

  13. Route Systems • State • 01: Interstate • 02: US Trunk Highway • 03: Mn Trunk Highway • City • 05: Municipal State Aid (MSAS) • 10: Municipal (M) • County • 04: County State Aid Highway (CSAH) • 07: County Road • Other • 08/09: Township (Organized/Unorganized) • 14: State Forest road • 23: Airport Roads • 24:Private roads (no ref points) • 30: Alleys (no ref points) • Etc.

  14. Crash Level data elements • Location • Route System • Route Number • Reference point • (nnn+00.111 is wild guess) • Interchange element • Reliability • Numbers = DPS only, Alpha = MnDOT • 1 or A – Confident (within feet) • 2 or B – Less confident (within .25 mi) • 3 or C - Best guess (within 1 mile) • 4 or D - Wild guess (within county or city) • City • County

  15. Route Number (8 digits) • Trunk Highways (Systems 1 – 3) • Leading zeroes not needed • ISTH35W (stored as 0000035W) • USTH169 (stored at 00000169) • MNTH7 (stored as 00000007) • City Streets (MSAS and MUN) • First 4 digits are city number (NOT state aid number, but census number) • MSAS10400101(Duluth) • MUN 12500065(Faribault) • ALL OTHERS • First 2 digits are county number • CSAH02000001(Anoka county) • CR19000101(Dakota county)

  16. Crash Level data elements • Location • Route System • Route Number • Reference point • (nnn+00.111 is wild guess) • Interchange element • Reliability • Numbers = DPS only, Alpha = MnDOT • 1 or A – Confident (within feet) • 2 or B – Less confident (within .25 mi) • 3 or C - Best guess (within 1 mile) • 4 or D - Wild guess (within county or city) • City • County

  17. Interchange Element Sketches

  18. Crash Level Data Elements • Non-Location • When • Date • Time • Day of week • Light conditions • What • Type • Weather conditions • Road Conditions • Speed limit • Work Zone • Etc. • Severity • For CRASH, derived from most severe injury/fatality • Number killed • Number Injured

  19. Person Level Data Elements • Who • Non-Public (Name, Address) we do NOT get • Age • Gender • Condition • Alcohol • Drugs • License restrictions/endorsements • Safety Equipment • Seat Belts • Air bags • Helmet • Severity

  20. Vehicle Level Data Elements • Vehicle info • Type • Make • Body type • Actions • Contributing factors (up to 2) • Sequence of Events (up to 4) • Pre-accident Action • Most harmful event • Direction of Travel

  21. Transportation Information System (TIS) • Created in 1970’s • Mainframe: • User ID • SPF, JCL, TSO, ACF2 • #?!#!!!! (not user friendly) • Huge users manual • Reports fixed format

  22. Generation 1 – 1970’s and 1980’sList Accidents by Ref Point (paper)

  23. Generation 2 – 1990’sExcel spreadsheets Crash Level Vehicle/Person Level

  24. Pro’s – ALL Methods Important • TIS Mainframe • Traffic/Rate capabilities • Has intersection/section capabilities • Has sophisticated multi file linkages • The only practical option for some analysis • Excel • Easy to use – well known software • Sort and filter • Updated easily • MnCMAT • Mapping • Charting • Filtering

  25. Generation 3 – 2000’sMnCMAT

  26. Presentation Overview • Development of Program • MnCMAT Features • Case Studies • Gaining Access • Questions and Demonstration

  27. Brief History of MnCMAT • Developed in Iowa • late 1990’s – early 2000’s • Iowa DOT & CTRE @ ISU • Original named Crash Mapping Analysis Tool (CMAT) • Introduced to Minnesota in 2006 • Via County Engineers • Funded by • Local Road Research Board (LRRB) Project • Research Implementation Committee (RIC) • State Aid for Local Transportation (SALT)

  28. Crash Analysis Tool Classification • Macroscopic Tool • Large Area Coverage • Trends and Statistics • Microscopic Tool • Drill Down Capabilities • Filters • Selection Capabilities • GIS Base Mapping Tool • Visual Tool • Charts • Maps • Reports • Data Files

  29. Basics of MnCMAT Program MnCMAT GIS Based Mapping System MnDOT Mainframe Data T.I.S. Data is Generated from Law Enforcement and Citizen Crash Reports

  30. Basic MnCMAT Crash Analysis Process • Step 1 • Select Area to be Analyzed • Step 2 • Apply Filtering Criteria • Step 3 • Generate Output • Maps • Charts • Reports • Data Files

  31. Basic MnCMAT Crash Analysis Process • Step 1 • Select Area to be Analyzed

  32. MnCMAT Data • Covers Entire State • Primary Selection by County, District, Tribal Government, or State • Multiple Secondary Selection Methods • Rectangle • Polygon • Circle • Roadway Segments

  33. State Wide Selection

  34. MnCMAT Data • Covers Entire State • Primary Selection by County, District, Tribal Government, or State • Multiple Secondary Selection Methods • Rectangle • Polygon • Circle • Roadway Segments

  35. Single County Selection

  36. Multiple County Selection

  37. County Selection

  38. MnCMAT Data • Covers Entire State • Primary Selection by County, District, Tribal Government, or State • Multiple Secondary Selection Methods • Rectangle • Polygon • Circle • Roadway Segments

  39. MnCMAT Toolbars

  40. MnCMAT Data • Covers Entire State • Primary Selection by County, District, Tribal Government, or State • Multiple Secondary Selection Methods • Rectangle • Polygon • Circle • Roadway Segments

  41. Selection by Rectangle

  42. MnCMAT Data • Covers Entire State • Primary Selection by County, District, Tribal Government, or State • Multiple Secondary Selection Methods • Rectangle • Polygon • Circle • Roadway Segments

  43. Selection by Polygon

  44. MnCMAT Data • Covers Entire State • Primary Selection by County, District, Tribal Government, or State • Multiple Secondary Selection Methods • Rectangle • Polygon • Circle • Roadway Segments

  45. Selection by Circle

  46. MnCMAT Data • Covers Entire State • Primary Selection by County, District, Tribal Government, or State • Multiple Secondary Selection Methods • Rectangle • Polygon • Circle • Roadway Segments

  47. Selection by Road Segment

  48. Select Location with Find Location Selection • County • City • Intersection • Crash Number • XY Coordinate

  49. Crash Data Using Stacks

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