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?