1. Crash Severity for Lane Departures Crashes
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 ?”

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

3. Lane Departure Crashes by Severity

4. Lane Departure Crashes by Severity
The previous slide illustrates that most crashes between involved property damage followed by possible injury crashes.
There was a total of 297 crashes during this time frame.

5. Case Study No. 2
Q. “What are the most dominant crash diagram types resulting from chemical impairment as the 1st contributing factor in the City of Faribault?”

6. Steps Needed for Case 2 Select Crash Data, then select Crash Filters.
Select City under Location Filters and then check Faribault.
Select Contributing Factor 1 under Attribute Filters and then check Chemical Impairment.
Click OK.
Select Charts, then select Diagram under the dropdown menu, then select Add Chart

7. Crash Diagram resulting from Chemical Impairment in Faribault

8. Crash Diagram resulting from Chemical Impairment in Faribault
The bar 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 ran off road (left side)
There was a total of 53 crashes.

9. Case Study No. 3
Q. “What number of reported crashes involve younger (under 21) inexperienced drivers as the 1st contributing factor that ran off the road in Faribault?”

10. Steps Needed for Case 3 Select Crash Data, then select Crash Filters.
Select City, and then check Faribault.
Select Driver Age, then check appropriate boxes for Drivers under 21.
Select Contributing Factor 1, then check Inexperience.
Select Crash Diagram and select crash codes pertaining to lane departure crashes. (sideswipe passing/opposing, Ran off Road-Left/Right and head on), then click Ok.
Select Charts, then select Diagram under the dropdown menu, then select Add Chart.

11. Distracted Young Drivers
Online MnCMAT Tool

12. Inexperienced Young Drivers
The crash reports indicate that there was one head on, two ran off road right side, and one ran off road left side crashes.

13. 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 as the 1st contributing factor within the Metro District ?”

14. Steps Needed for Case 4
Select Create New Project, then select the Metro District and click OK.
Select Crash Data, then select Crash Filters, then select Crash Severity and select the appropriate codes for K & A crashes.
Select Driver Age and select the appropriate ages for drivers under 21.
Select Contributing Factor 1 and select Disregard Traffic Device, and click OK.
Select Charts, then select Crash Severity under the dropdown menu, and then select Add Chart.

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

16. Young (<21) Drivers involved in K & A crashes by Disregarding Traffic Devices in Metro District
The graphs on the previous slide show that there were a total of 145 K & A crashes involving young drivers disregarding traffic devices
Of the 145 crashes, 115 crashes (almost 80%) were incapacitating accidents