Indiana Department of Transportation

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Presentation transcript:

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

Using vehicle probe data for identifying crash locations and queue lengths

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

Built a tool to display data

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

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

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

Back of queue, growing

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!

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

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

Work Zone Specific Congestion

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

Questions? Jim Sturdevant INDOT Director Traffic Management jsturdevant@indot.in.gov 317-899-8603 Edward D Cox INDOT Traffic Management ecox@indot.in.gov 317-899-8601