DataDan
Mama says he's bona fide
If you just happened into this thread, spare yourself the tedious beginning and jump right to the conclusions here.
This thread will analyze in considerable depth motorcycle crashes in the Bay Area 2013-2017. It will include police-reported crashes of all severities (non-injury to fatal), and I will eventually present data on factors such as type of road, time and day of the week, other vehicles involved, pre-crash movements, fault as assigned by law enforcement, alcohol involvement, injury severity, and more.
I haven't done one of these tables-and-graphs threads in a long time, and I hope the local focus will be of interest. I chose a 5-year time period to strengthen conclusions about less-frequent occurrences, and for now, 2017 is the most recent complete data available.
If you have a suggestion for a topic you'd like to see, I'll try to include it if the data is available (cell phone usage is not).
First up is the trend in crashes and crash rate since 2001 (earliest detailed data I have):
The crash rate has been fairly flat at around 16 crashes per 1000 registrations for 15 years, except for the drop during the recession. Though the source I use for registrations by county hasn't been updated in two years, I would guess that, based on a slight statewide increase, the rate continues flat through 2017. It appears that the perceived increase in motorcycle crash risk due to increasingly careless drivers has not been severe.
Next is the breakdown by county. Pretty much what you'd expect.
Finally, a look at single- and multiple-vehicle crashes and rider injury severity.
rider injury
|
single vehicle
|
multiple vehicle
|
all crashes
|
ped & cyclist
no injury|398|2,875|3,273|
minor injury|2,723|7,674|10,397|
major injury|725|1,370|2,095|
fatal|91|227|318|
total|3,937|12,146|16,083|240
||||
lethality|2.3%|1.9%|2.0%|
The "ped & cyclist" column shows motorcycle crashes in which a pedestrian or cyclist was involved. "Lethality" is fatalities as a percentage of crash-involved riders. The difference between single- and multiple-vehicle crashes in that respect is not surprising; it is seen also in statewide and US data.
And because I wanted to do a pie chart, here's the injury severity distribution in that format:
The fine print:
Data for all crashes is from CHP's SWITRS database (Statewide Integrated Traffic Records System). Unfortunately, it is down for maintenance with no estimate of return, so no link for now. Fatal crash data is from NHTSA's FARS database (Fatality Analysis Reporting System).
This thread will analyze in considerable depth motorcycle crashes in the Bay Area 2013-2017. It will include police-reported crashes of all severities (non-injury to fatal), and I will eventually present data on factors such as type of road, time and day of the week, other vehicles involved, pre-crash movements, fault as assigned by law enforcement, alcohol involvement, injury severity, and more.
I haven't done one of these tables-and-graphs threads in a long time, and I hope the local focus will be of interest. I chose a 5-year time period to strengthen conclusions about less-frequent occurrences, and for now, 2017 is the most recent complete data available.
If you have a suggestion for a topic you'd like to see, I'll try to include it if the data is available (cell phone usage is not).
First up is the trend in crashes and crash rate since 2001 (earliest detailed data I have):
The crash rate has been fairly flat at around 16 crashes per 1000 registrations for 15 years, except for the drop during the recession. Though the source I use for registrations by county hasn't been updated in two years, I would guess that, based on a slight statewide increase, the rate continues flat through 2017. It appears that the perceived increase in motorcycle crash risk due to increasingly careless drivers has not been severe.
Next is the breakdown by county. Pretty much what you'd expect.
Finally, a look at single- and multiple-vehicle crashes and rider injury severity.
no injury|398|2,875|3,273|
minor injury|2,723|7,674|10,397|
major injury|725|1,370|2,095|
fatal|91|227|318|
total|3,937|12,146|16,083|240
||||
lethality|2.3%|1.9%|2.0%|
The "ped & cyclist" column shows motorcycle crashes in which a pedestrian or cyclist was involved. "Lethality" is fatalities as a percentage of crash-involved riders. The difference between single- and multiple-vehicle crashes in that respect is not surprising; it is seen also in statewide and US data.
And because I wanted to do a pie chart, here's the injury severity distribution in that format:
The fine print:
Data for all crashes is from CHP's SWITRS database (Statewide Integrated Traffic Records System). Unfortunately, it is down for maintenance with no estimate of return, so no link for now. Fatal crash data is from NHTSA's FARS database (Fatality Analysis Reporting System).
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