Presentation is loading. Please wait.

Presentation is loading. Please wait.

Minnesota Crash Mapping Analysis Tool (MnCMAT) & Crash Data Mark Vizecky (Va-Sis-Ski) State Aid for Local Transportation Program Support Engineer March.

Similar presentations


Presentation on theme: "Minnesota Crash Mapping Analysis Tool (MnCMAT) & Crash Data Mark Vizecky (Va-Sis-Ski) State Aid for Local Transportation Program Support Engineer March."— Presentation transcript:

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

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

4 Police Accident Report (PAR) Overlay Report

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

6

7 Citizen Accident Report Report (Front) Report (Back)

8 D-16 Manual …promote uniformity and comparability of motor vehicle traffic statistics..

9 D-16: Sample (53 pages)

10 Model Minimum Uniform Crash Criteria (MMUCC) …provide a minimum, standardized data set for describing crashes of motor vehicles..

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

12 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

13 Crash Level data elements Location Route System Route Number Reference point (nnn 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

14 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.

15 Crash Level data elements Location Route System Route Number Reference point (nnn 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

16 Route Number (8 digits) Trunk Highways (Systems 1 – 3) Leading zeroes not needed ISTH 35W (stored as W) USTH 169 (stored at ) MNTH 7 (stored as ) City Streets (MSAS and MUN) First 4 digits are city number (NOT state aid number, but census number) MSAS (Duluth) MUN (Faribault) ALL OTHERS First 2 digits are county number CSAH (Anoka county) CR (Dakota county)

17 Crash Level data elements Location Route System Route Number Reference point (nnn 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

18 Interchange Element Sketches

19 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

20 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

21 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

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

23 Generation 1 – 1970s and 1980s List Accidents by Ref Point (paper)

24 Generation 2 – 1990s Excel spreadsheets Crash Level Vehicle/Person Level

25 Pros – 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

26 Generation 3 – 2000s MnCMAT

27 Presentation Overview Development of Program MnCMAT Features Case Studies Gaining Access Questions and Demonstration

28 Brief History of MnCMAT Developed in Iowa late 1990s – early 2000s Iowa DOT & 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)

29 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

30 Basics of MnCMAT Program Transportation Information System (T.I.S.) LocationCrash Type Road Condition Driver Data XXXXXX GIS Based Mapping System MnDOT Mainframe Data MnCMAT T.I.S. Data is Generated from Law Enforcement and Citizen Crash Reports

31 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

32 Basic MnCMAT Crash Analysis Process Step 1 Select Area to be Analyzed

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

34 State Wide Selection

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

36 Single County Selection

37 Multiple County Selection

38 County Selection

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

40 MnCMAT Toolbars

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

42 Selection by Rectangle

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

44 Selection by Polygon

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

46 Selection by Circle

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

48 Selection by Road Segment

49 Select Location with Find Location Selection County City Intersection Crash Number XY Coordinate

50 Crash Data Using Stacks

51 Interchange Element Sketches Question: How many crashes occurred at this interchange?

52 A B C

53 Basic MnCMAT Crash Analysis Process Step 1 Select Area to be Analyzed Step 2 Apply Filtering Criteria

54 Filter Selection

55 Filter Categories City Contributing Factor 1 Contributing Factor 2 County Crash Diagram Crash Severity Day of Month Day of Week Driver Age Driver Condition Driver Gender First Harmful Event Investigating Officer Light Condition MnDOT District Month Number of Fatalities Number of Vehicles Relation to Intersection Reliability of Information Road Design Roadway Character Speed Limit Surface Conditions System Class Time of Day Traffic Control Device Travel Direction Tribal Govt. Type of Crash Type of Work Zone Vehicle Action Vehicle Travel Direction Vehicle Type Weather Conditions Year

56 Filters Within MnCMAT Select the data applicable to the situation of interest. Single or multiple filters may be applied. Each filter provides AND logic between filter categories and OR logic within each filter

57 Active Filter Selection Statistics

58 Filters Within MnCMAT Select the data applicable to the situation of interest. Single or multiple filters may be applied. Each filter provides AND logic between filter categories and OR logic within each filter

59 Filters Within MnCMAT OR AND

60 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

61 Graphical Outputs

62 View of Crash Incidents in Larger Area

63 Wide Area Crash Locations with Stacks

64 Non-motorized Persons Were in Douglas County did crash number occur? What can you tell me about the pedestrian?

65 Data Exports

66 Crash Data Exports as a CSV or Shape File

67 Crash Data Exported as a CSV or Shape File

68 Charts

69 Crash Severity

70 Day of Week

71 Reports

72 Summary Report

73 Detail Report

74 Crash Type Summary Report

75 Driver and Time Summary

76 Top 100 Intersections Report

77

78 Top 100 Segments Report

79 Case Study No. 1 Crash Severity for Lane Departures Crashes Q. What is the crash severity for lane departure crashes in the city of Faribault between ?

80 1. Select Crash Data (circle with red, blue and yellow graphic), then select Crash Filters. 2.Highlight City under Location Filters, then check Faribault. 3.Highlight Crash Year, then check years Highlight Crash Diagram and select crash codes pertaining to Run off Road crashes. (sideswipe passing/opposing, Ran off Road-Left/Right and head on) 5.Click OK. 6.Select Charts, then select Crash Severity under the dropdown menu, then select Add Chart Steps Needed for Case 1

81 Lane Departure Crashes by Severity

82 The previous slide illustrates that most crashes between involved property damage followed by possible injury crashes. There was a total of 264 crashes during this time frame.

83 Case Study No. 2 Q. What are the most dominant crash types resulting from chemical impairment in the city of Faribault?

84 1.Select Crash Data, then select Crash Filters. 2.Highlight City under Location Filters and then check Faribault. 3.Highlight Vehicle Contrib. Factor 1 and then check Chemical Impairment. 4.Click OK. 5.Select Charts, then select Diagram under the dropdown menu, then select Add Chart Steps Needed for Case 2

85 Crash Diagram (Type) resulting from Chemical Impairment in Faribault

86 The pie chart on the previous slide illustrates that the three most occurring crashes as a result of chemical impairment are rear end, ran off the road (right side) and sideswipe (passing) There was a total of 56 crashes.

87 Case Study No. 3 Q. What number of reported crashes involve younger (under 21) distracted drivers (cell phone) that ran off the road in Faribault?

88 1.Select Crash Data, then select Crash Filters. 2.Highlight City, and then check Faribault. 3.Highlight Driver Age, then check appropriate boxes for Drivers under Highlight Vehicle Contrib. Factor 1, then select Car Phone/Two-Way Radio, then click OK. 5.Select Charts, then select Diagram under the dropdown menu, then select Add Chart. Steps Needed for Case 3

89 Distracted Young Drivers MnCMAT Version Online MnCMAT Tool

90 Distracted Young Drivers Reports generated using both MnCMAT programs confirm the details of the two crashes The crash reports indicate that there was one right angle and one rear end crash

91 Case Study No. 4 Q. How many young drivers (<21) were involved in K & A crashes that was a result of disregarding a traffic device within Metro District ?

92 1.Select Create New Project, then select the Metro District and click OK. 2.Select Crash Data, then select Crash Filters, then select Crash Severity and select the appropriate codes for K & A crashes. 3.Select Driver Age and select the appropriate ages for drivers under Select Vehicle Contrib. Factor 1 and select Disregard Traffic Device, and click OK. 5.Select Charts, then select Crash Severity under the dropdown menu, and then select Add Chart. Steps Needed for Case 4

93 Young (<21) Drivers involved in K & A crashes by Disregarding Traffic Devices in Metro District

94 The graphs on the previous slide show that there were a total of 140 K & A crashes involving young drivers Of the 140 crashes, 114 crashes (over 80%) were incapacitating accidents

95 Summary The proceeding case studies are very basic examples of use of MnCMAT. More complicated reports may be run. Even more complicated reports that require information on data not contained in MnCMAT (for example, seat belt use of non-drivers) would require special reports.

96 MnCMAT Distribution Being Supplied by MnDOT – State Aid No additional software required No Cost to City or County Agencies or Other Entities Approved by a City or County

97 Approval Form for Use

98 MnCMATs Website

99 DISCLAIMER The State, County and Municipal Transportation Authorities of Minnesota make no representation or warranties, express or implied, with respect to the reuse of the data provided herewith, regardless of its format or means of its transmission. There is no guarantee or representation to the user as to the accuracy, currentness, suitability, or reliability of this data for any purpose. The user accepts that data as is, and assumes all risks associated with its use. The State, County and Municipal Transportation Authorities of Minnesota assume no responsibility, actual or consequential damage, as a result of any users reliance of this data. By submitting this form, you are stating that you understand that this application is only a tool and that Engineering Judgment must be used when interpreting all data. You are also agreeing that you understand that the data set used by this program is subject to errors and changes, therefore not to be assumed as absolute. The Minnesota Department of Transportation, State Aid Division maintains all rights to this application and may revoke your privileges of use at any time.

100 MnCMAT Support Contact Mark Vizecky Sulmaan Khan

101 Intersection Green sheets

102 Section

103 Top 200 Intersections – per location

104 Crash costs – Step 1 Get Minnesota Data CrashesFatalitiesInjury AInjury BInjury CVehicles Fatal 1,569 1, ,730 Severity A 5, ,636 1,735 1,494 9,991 Severity B 26, ,928 6,824 48,788 Severity C 49, ,755 96,651 PDO 186, ,915 Total270,9501,7247,04736,21874, ,074

105 Step 2 – get current year costs from FHWA SeverityFatal Costs Injury A Costs Injury B Costs Injury C CostsPDO CostsSum CostsCrashes Cost per Crash Fatal$5,598,840,847$92,293,939$24,956,461$12,150,974*$5,728,242,2201,569$3,650,887 Severity A$1,491,991,660$77,994,561$35,456,161*$1,605,442,3825,674$282,947 Severity B$1,525,626,673$161,937,828*$1,687,564,50126,975$62,561 Severity C$1,560,522,001* 49,894$31,277 PDO$851,654, ,839$4,558 Step 3 – calculate cost for current year YearGDP DeflatorFatalA injuryB InjuryC InjuryPDO $3,065,246$212,209$42,442$22,400$2, $3,152,240$218,232$43,646$23,036$2, $3,247,587$224,833$44,967$23,732$2,498 *PDO costs are not shown due to incorporation into other crash severities.

106 Crash Costs Crash SeverityExisting CostNew (2008) Cost Fatal$3,700,000$6,800,000 Severity A$280,000$390,000 Severity B$63,000$121,000 Severity C$31,000$75,000 PDO$4,600$12,000

107 Top 150 Sections – per mile

108 Crash Rates Determined by dividing observed crash frequency by measure of exposure Crash Rate = Crash Frequency Exposure/Unit of Time

109

110 Crash Rates AADT Frequency (Crashes/Year) 5,00010,00015, X Y Rate = Y/X Short Comings: Assumes a linear relationship Drives prioritization toward low volume routes

111 Crash Density For Intersections Density = Crashes For Sections Density = Crashes/Miles Rates or Density ?

112 Severity Rates For Intersections SR = ((F*5)+(A*4)+(B*3)+(C*2)+(PD)) (EV * Days) Where EV = Entering Vehicles. For Sections SR = ((F*5)+(A*4)+(B*3)+(C*2)+(PD)) (ADT*Length * Days)

113 CRASH FACTS – annual report by DPS Provides a statistical summary Minnesotas reported crashes

114 Fundamentals Book

115 Crash Modification Factors (CMFs)

116 Books Worth Reading The Drunkards Walk Traffic

117 Minnesota miles of Interstate 11k miles of Trunk Highway 45k miles of County Road 22k miles of City Streets 62k miles of Township/Other roads 2009 K & A Crashes 421 Fatalities 1,036 Severe Injury Crashes 141,000 miles of Roadway

118 HSIP Program Challenge to determine where to focus safety funds Black spots are infrequent on local roads Fatal and Severe injury crashes are random on local roads County Roads 2,089 Severe Crashes 45,000 miles of road 0.05 severe crashes per mile Trunk Highway 2,168 Severe Crashes 12,000 miles of road 0.18 severe crashes per mile

119 Surrogates Heart Disease Smoking Obesity Cholesterol Blood pressure Physical activity Stress Age/sex/heredity

120 Surrogates Heart Disease Smoking Obesity Cholesterol Blood pressure Physical activity Stress Age/sex/heredity Surrogates for severe crashes? Segments, Intersection, Run off Road Crashes…

121 Surrogates for Segments Traffic Volume Density of Road Departure Crashes Curve (Critical Radius) Density Edge Risk Assessment Access Density If surrogate applies to a segment of road

122 Surrogates for Curves ADT Range Radius Range Visual Trap on Curve Intersection on Curve Severe Crash on Curve If surrogate applies to a roadway Curve

123 Surrogates for Rural Thru STOP Intersections Geometry Skewed minor leg approach Intersection on/near horizontal curve Volume Minor ADT/Major ADT ratio Proximity Previous STOP sign Railroad crossing Intersection Related Crashes Commercial Development in quadrants

124 Questions?


Download ppt "Minnesota Crash Mapping Analysis Tool (MnCMAT) & Crash Data Mark Vizecky (Va-Sis-Ski) State Aid for Local Transportation Program Support Engineer March."

Similar presentations


Ads by Google