Boise Bicycle Crashes 2007 – 2014 with Infrastructure Context

by PJ Mitchell,

The importance of data visualization is in it’s ability to make connections. In the map journal application below, we’ve provided the spatial bicycle crash data from 2007 to 2014, the existing (current as of early 2015) urban bicycling infrastructure, and the 1976 proposed off-street multi-use paths (i.e. cycletracks) from Boise’s original Master Bicycle Plan. In a nutshell, what you’ll see is that crashes happen equally on and off built cycling infrastructure. We can wonder, how safe really are bike lanes and why do so many crashes happen on streets without bike lanes? Are there alternatives to traditional bike lanes that make cycling safer in an urban setting? Where are the examples of this here?

In the context of the proposed 1976 cycletracks we’re also left to speculate how many crashes and fatalities may have been prevented had the City of Boise moved forward with it’s original plans. To launch the application, please click on the map image below. Additionally we’ve provided several charts beneath this map that document the crash rates for both on and off infrastructure crashes from 2007 – 2014.

The question that must be asked is: are our public agencies and elected officials doing enough to make bicycling a safe alternative for Boise and Ada County’s citizens? Do we know what safe bicycling infrastructure even looks like? If we can not make bicycling safe in our community how can we expect to increase rates of participation and make Boise “the most livable city in the country” as Mayor Bieter likes to say.



Bicycle Infrastructure Crash Rates Comparison 2007 – 2014


Off-Infrastructure Bicycle Crash Rates 2007 – 2014


On-Infrastructure Bicycle Crash Rates 2007 – 2014