crash data analysis overview vision zero conference ema carol yamamoto
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CRASH DATA ANALYSIS OVERVIEWVision Zero Conference
Ema Carol Yamamoto
VISION ZERO CONFERENCEHOW CRASH DATA IS COLLECTED &
ANALYZEDPHILADELPHIA STATISTICS • Philadelphia is multimodal city• Since 2010, over 10,600
crashes have occurred every year
• While drivers and pedestrians make up the majority of people involved in crashes…
• Other modes are more likely to be severely injured or killed if involved in a crash
• We have seen pedestrian fatalities continue to rise every year since 2010
VISION ZERO CONFERENCEHOW CRASH DATA IS COLLECTED &
ANALYZEDPHILADELPHIA STATISTICS • Philadelphia is multimodal city• Since 2010, over 10,600
crashes have occurred every year
• While drivers and pedestrians make up the majority of people involved in crashes…
• Other modes are more likely to be severely injured or killed if involved in a crash
• We have seen pedestrian fatalities continue to rise every year since 2010
VISION ZERO CONFERENCEHOW CRASH DATA IS COLLECTED &
ANALYZEDPHILADELPHIA STATISTICS • Philadelphia is multimodal city• Since 2010, over 10,600
crashes have occurred every year
• While drivers and passengers make up the majority of people involved in crashes…
• Other modes are more likely to be severely injured or killed if involved in a crash
• We have seen pedestrian fatalities continue to rise every year since 2010
VISION ZERO CONFERENCEHOW CRASH DATA IS COLLECTED &
ANALYZEDPHILADELPHIA STATISTICS • Philadelphia is multimodal city• Since 2010, over 10,600
crashes have occurred every year
• While drivers and passengers make up the majority of people involved in crashes…
• Other modes are more likely to be severely injured or killed if involved in a crash
• We have seen pedestrian fatalities continue to rise every year since 2010
VISION ZERO CONFERENCEHOW CRASH DATA IS COLLECTED &
ANALYZEDPHILADELPHIA STATISTICS • Philadelphia is multimodal city• Since 2010, over 10,600
crashes have occurred every year
• While drivers and passengers make up the majority of people involved in crashes…
• Other modes are more likely to be severely injured or killed if involved in a crash
• We have seen pedestrian fatalities continue to rise every year since 2010
VISION ZERO CONFERENCEHOW CRASH DATA IS COLLECTED &
ANALYZEDWHAT IS A CRASH IN PENNSYLVANIA?• Crash requires that a motorvehicle is involved AND– Someone is injured in the crash; and/or– A vehicle has to be towed from the scene
• What is a crash?– A car hits another car and one of the cars is towed from
the scene– A car hits a pedestrian and the pedestrian goes to the
hospital• What is a crash not? – A cyclist hits a pedestrian and the pedestrian goes to
the hospital– A car hits a pedestrian and the pedestrian walks away
and the car is able to drive away
VISION ZERO CONFERENCEHOW CRASH DATA IS COLLECTED &
ANALYZEDCRASH DATA OVERVIEW
Philly Police crash report generated
VISION ZERO CONFERENCEHOW CRASH DATA IS COLLECTED &
ANALYZEDCRASH DATA OVERVIEW
Philly Police crash report generated
Crash reports shared with Streets
VISION ZERO CONFERENCEHOW CRASH DATA IS COLLECTED &
ANALYZEDCRASH DATA OVERVIEW
Philly Police crash report generated
Crash reports shared with Streets
PennDOT receives all reportable crash reports and aggregates information into a database
VISION ZERO CONFERENCEHOW CRASH DATA IS COLLECTED &
ANALYZEDCRASH DATA OVERVIEW
Philly Police crash report generated
Crash reports shared with Streets
PennDOT receives all reportable crash reports and aggregates information into a database
Highway patrol crash report generated
VISION ZERO CONFERENCEHOW CRASH DATA IS COLLECTED &
ANALYZEDCRASH DATA OVERVIEW
Philly Police crash report generated
Crash reports shared with Streets
PennDOT receives all reportable crash reports and aggregates information into a database
Highway patrol crash report generated
City of Philadelphia receives crash database
VISION ZERO CONFERENCEHOW CRASH DATA IS COLLECTED &
ANALYZEDCRASH DATA OVERVIEW
Philly Police crash report generated
Crash reports shared with Streets
PennDOT receives all reportable crash reports and aggregates information into a database
Highway patrol crash report generated
City of Philadelphia receives crash database
More immediate but not complete picture
VISION ZERO CONFERENCEHOW CRASH DATA IS COLLECTED &
ANALYZEDCRASH DATA OVERVIEW
Philly Police crash report generated
Crash reports shared with Streets
PennDOT receives all reportable crash reports and aggregates information into a database
Highway patrol crash report generated
City of Philadelphia receives crash database
More immediate but not complete picture
Released annually, provides complete picture of all crashes
VISION ZERO CONFERENCEHOW CRASH DATA IS COLLECTED &
ANALYZEDCRASH DATA OVERVIEW
Philly Police crash report generated
Crash reports shared with Streets
PennDOT receives all reportable crash reports and aggregates information into a database
Highway patrol crash report generated
City of Philadelphia receives crash database
More immediate but not complete picture
Released annually, provides complete picture of all crashes
Modified version of this data on Open Data Philly: https://www.opendataphilly.org/dataset/vehicular-crash-data
VISION ZERO CONFERENCEHOW CRASH DATA IS COLLECTED &
ANALYZEDDATA SETS RELEASEDTable Name Data Level DescriptionCRASH Crash level Information about the crash and counts of items involved, such as:
Where: County, Municipality, Work zone, Latitude, Longitude When: Date, Time, Day of Week, Hour of Day, Month of Year Item Counts: People, Vehicles, Unbelted, Fatal, etc.
PERSON Person level Information for each person involved in the crash, such as: Age, Sex, and Injury Severity Level.
ROADWAY Roadway segment level
Information about all the roadways, such as: Route number or name and Type of Roadway.
VEHICLE Unit level Information about all vehicles involved in the crash, such as: Unit type in the crash.
VISION ZERO CONFERENCEHOW CRASH DATA IS COLLECTED &
ANALYZEDDATA NUANCES
• Explanation of crash vs. person vs. vehicle files
1 Vehicle (1 Driver and
2 Passengers)
3 Pedestrians
1 Crash
4 Vehicle Units
6 People
VISION ZERO CONFERENCEHOW CRASH DATA IS COLLECTED &
ANALYZEDDATA NUANCES
• Explanation of crash vs. person vs. vehicle files
1 Vehicle (1 Driver and
2 Passengers)
3 Pedestrians
1 Crash
4 Vehicle Units
6 People
VISION ZERO CONFERENCEHOW CRASH DATA IS COLLECTED &
ANALYZEDDATA NUANCES
• Explanation of crash vs. person vs. vehicle files
1 Vehicle (1 Driver and
2 Passengers)
3 Pedestrians
1 Crash
4 Vehicle Units
6 People
VISION ZERO CONFERENCEHOW CRASH DATA IS COLLECTED &
ANALYZEDDATA NUANCES
• Explanation of crash vs. person vs. vehicle files
1 Vehicle (1 Driver and
2 Passengers)
3 Pedestrians
1 Crash
4 Vehicle Units
6 People
VISION ZERO CONFERENCEHOW CRASH DATA IS COLLECTED &
ANALYZEDQUICK SUMMARY OF 2014 STATS
Total Involved Crashes
Total Hit in Crashes
Total Killed in Crashes
Total Severely Injured in Crashes
Pedestrian 1,558 1,626 38 55
Bicycle 551 552 3 13
Motorcycle 285 303 16 35
VISION ZERO CONFERENCEHOW CRASH DATA IS COLLECTED &
ANALYZEDEXAMPLE ANALYSIS | TRENDS ANALYSIS
19841986
19881990
19921994
19961998
20002002
20042006
20082010
20122014
0
20
40
60
80
100
120
Traffic Fatalities by Mode per Year,1984-2014
VISION ZERO CONFERENCEHOW CRASH DATA IS COLLECTED &
ANALYZEDEXAMPLE ANALYSIS | TRENDS ANALYSIS
1984-1988
1986-1990
1988-1992
1990-1994
1992-1996
1994-1998
1996-2000
1998-2002
2000-2004
2002-2006
2004-2008
2006-2010
2008-2012
2010-20140
20
40
60
80
100
120
5-Year Average of Traffic Fatalities by Mode, 1984-2014
19841986
19881990
19921994
19961998
20002002
20042006
20082010
20122014
0
20
40
60
80
100
120
Traffic Fatalities by Mode per Year,1984-2014
VISION ZERO CONFERENCEHOW CRASH DATA IS COLLECTED &
ANALYZEDEXAMPLE ANALYSIS | 2010-2014 KD MAP
VISION ZERO CONFERENCEHOW CRASH DATA IS COLLECTED &
ANALYZEDONGOING DISCUSSIONS• Data Accuracy – What crash events are we capturing?
– Currently the City is designing a possible research program to bridge the gaps in our data
• Crashes vs. Crash Severity – Do we want to rank intersections/roadways by the number of crashes which occur?– Vision Zero is focused on the elimination of fatalities and severe injuries,
we should be ranking our intersections/roadways to match• Normalization – Which is more important, the number of crash
events? Or the number of crash events per number of road users?– Ongoing bicycle, pedestrian, and vehicle counts by DVRPC help to illustrate
a larger picture and put crashes in context• Other Data Resources – What other data resources could we obtain
with greater resources?– Behavior data from police citations and warnings, fleet telematics
VISION ZERO CONFERENCEHOW CRASH DATA IS COLLECTED &
ANALYZEDONGOING DISCUSSIONS• Data Accuracy – What crash events are we capturing?
– Currently the City is designing a possible research program to bridge the gaps in our data
• Crashes vs. Crash Severity – Do we want to rank intersections/roadways by the number of crashes which occur?– Vision Zero is focused on the elimination of fatalities and severe injuries,
we should be ranking our intersections/roadways to match• Normalization – Which is more important, the number of crash
events? Or the number of crash events per number of road users?– Ongoing bicycle, pedestrian, and vehicle counts by DVRPC help to illustrate
a larger picture and put crashes in context• Other Data Resources – What other data resources could we obtain
with greater resources?– Behavior data from police citations and warnings, fleet telematics
VISION ZERO CONFERENCEHOW CRASH DATA IS COLLECTED &
ANALYZEDONGOING DISCUSSIONS• Data Accuracy – What crash events are we capturing?
– Currently the City is designing a possible research program to bridge the gaps in our data
• Crashes vs. Crash Severity – Do we want to rank intersections/roadways by the number of crashes which occur?– Vision Zero is focused on the elimination of fatalities and severe injuries,
we should be ranking our intersections/roadways to match• Normalization – Which is more important, the number of crash
events? Or the number of crash events per number of road users?– Ongoing bicycle, pedestrian, and vehicle counts by DVRPC help to illustrate
a larger picture and put crashes in context• Other Data Resources – What other data resources could we obtain
with greater resources?– Behavior data from police citations and warnings, fleet telematics
VISION ZERO CONFERENCEHOW CRASH DATA IS COLLECTED &
ANALYZEDONGOING DISCUSSIONS• Data Accuracy – What crash events are we capturing?
– Currently the City is designing a possible research program to bridge the gaps in our data
• Crashes vs. Crash Severity – Do we want to rank intersections/roadways by the number of crashes which occur?– Vision Zero is focused on the elimination of fatalities and severe injuries,
we should be ranking our intersections/roadways to match• Normalization – Which is more important, the number of crash
events? Or the number of crash events per number of road users?– Ongoing bicycle, pedestrian, and vehicle counts by DVRPC help to illustrate
a larger picture and put crashes in context• Other Data Resources – What other data resources could we obtain
with greater resources?– Behavior data from police citations and warnings, fleet telematics
Questions?
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