AHTD’s Crash Location Tool and Utilizing Incident Analyst for Crash Event Analysis

Arkansas’State Highway Crashes

2010

Presentation Topics

• Overview of AHTD’s LRS

• How we collected Crash Locations

• The Problem

• The Solution – AHTD’s NEW Crash Location Tool

• Utilizing Incident Analyst for Crash Analysis and other types of analysis

3

16,416 Miles of State Highway System15,472 Miles of the other routes eligible

for Federal Aid

AHTD’s Linear Referencing System

4

154 Changes made from January 2011 to December 2011 on the State Highway System

Re-logged Routes

Changing AHTD’s Linear Referencing System

5

Mapping Events on AHTD’s LRS

CountyRouteSectionLog Mile

6

WHY COUNTY, ROUTE, SECTION and LOG MILE?

Think of it as the AHTD’s Addressing System

7

Each event/structure has it’s own “address” or log mile on the Linear Referencing System

Cleburne County: Hwy. 25 Section 3

8

State Police and County/City law enforcement record the crash events in a standard crash report format.

AHTD Crash Locators get the electronic copy of the crash report andcheck/determine the crash location by county, route, section & log mileAnd send back any corrections needed.

Each crash event is entered into a database housed with the State Police.

Collecting Crash Data

9

10

11

Crash Location

Hwy. 82 Section 03BEnd Log Mile 1.65

12

Crash Location

Hwy. 82 Section 03BEnd Log Mile 1.65

?

13

Crash Location

Hwy. 79 Section 010End Log Mile 18.26

14

Crash Database

52 Different Fields of Information per Crash

15

Crash Database

County, Route, Section and Log Mile are used to map each crash.

16

Law Enforcement – Determining Log Mile

Begin Log Mile

End Log MileBridge Log Miles

17

Begin Log Mile

End Log Mile

Law Enforcement – Determining Log Mile

18

Making it Easier!The LRS Location Tool Methodology

Point placed every100 feet on LRS

19

Making it Easier!The LRS Location Tool Methodology

Using Spatial Intersection,Populate Log Mile Points with Road Inventory Data

20

Making it Easier!The LRS Location Tool Methodology

Export out both layers to shapefiles.

Export files to a KML (for Google Earth) using Shp2kml converter.

21

Making it Easier!The LRS Location Tool

= State Highway System

= Other Routes Eligible forFederal Aid

22

Making it Easier!The LRS Location Tool

Making it Easier!The LRS Location Tool

City Limits Included for Each County KMZ File

Highway Base map Included for Zoom In Reference

Centerline/Interchanges/Ramps/Frontage RoadsAll Locatable

Google Street View

24

Making it Easier!The LRS Location Tool

Grant_County.kmz

Let’s Take a Look!

25

What now?

26

27

Highway Safety Studies

28

46.5 %

53.5 %

30

INCIDENT COUNT

31

REPEAT INCIDENTS

32

HOTSPOT MAPPING

33

HOTSPOT MAPPING

Attribute IntensitySnow Crashes

34

HOTSPOT MAPPING

Attribute Intensity

Alcohol Crashes

35

CHANGE OVER TIME

JANUARY

36

CHANGE OVER TIME

FEBRUARY

37

CHANGE OVER TIME

MARCH

38

CHANGE OVER TIME

APRIL

39

CHANGE OVER TIME

MAY

40

CHANGE OVER TIME

JUNE

41

TEMPORAL REPORTING

42

Administration

43

44

45

Public Involvement

46

Not Just for Crash Data

SKID Data

47

Not Just for Crash Data

Pavement DataIRI

48

Not Just for Crash Data

Pavement DataRutting

49

QUESTIONS?