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Indiana Department of Transportation

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Presentation on theme: "Indiana Department of Transportation"— Presentation transcript:

1 Indiana Department of Transportation
Using vehicle probe data for identifying crash locations and queue lengths Jim Sturdevant & Ed Cox Indiana Department of Transportation June 5, 2017

2 Using vehicle probe data for identifying crash locations and queue lengths

3 Incident Detection Application
Explanation Delta Speed: Difference in speed from an initial segment to the adjacent segment downstream. This is where we as an industry need to focus our attention. High Speeds to low speeds indicates the back of a queue Direction of Travel Segment 1 Segment 2 Segment 3 XD Segments Real Time Data (every minute) 70 MPH 68 MPH 35 MPH Delta Speed -2 mph -33 mph

4 Built a tool to display data

5 Incident Detection Application
Purdue & INDOT Incident Detection Application New to Old Magnitude

6

7 Slow or stopped traffic
Previous back of queue Back of queue, growing Fast moving traffic

8 Slow or stopped traffic
Delta speed is decreasing Previous back of queue Back of queue, growing Fast moving traffic

9 Back of queue, growing

10 Another View of the Data “Volcano Diagrams”
Where is the delay 23 of 60 total miles < 45 mph How severe is the delay? 23 of 60 total miles < 45 mph And…10 miles is 0-15 mph Green is good, red is bad!

11 Post Incident Evaluation of Incidents
231 Signal Timing Exit 193 Tanker Roll Over Boone County Mobile Home Temp Signals Installed Cong shifts to 231 231/18 Flasher change Boone County Fatal

12 Conversion to flashing yellow
More 4 way stop queueing Back of Queue Crash Free flow conditions Queue Forms Police waving vehicles through 8 hour closure

13 Work Zone Specific Congestion

14 I-69 Hamilton/Madison This week’s report This week’s report

15 Questions? Jim Sturdevant INDOT Director Traffic Management
Edward D Cox INDOT Traffic Management

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