Cycle: Bike and Car Traffic Citations in Austin
Spring 2011
Technically (according to the officer who pulled me over on my bike) bikes and cars have equal road rights and responsibilities in Austin. I wanted to map a year's worth of traffic citations to see what the data revealed.
Fall 2012
One Hundred Sketches
I pulled the cycling data into ArcGIS and used a method called "sketching with data." I created one hundred maps to help me realize what relationships are best shown geographically.

Events that cluster in specific areas, such as driving the wrong way on a one-way street (sketch A), are revealed by geographic mapping. Geographic visualization does not show magnitude or frequency well. Looking at sketch B, you would not know that 18% of jaywalking citations for the year were issued at one intersection, during one hour. A time-frequency chart would show this information better.

Creating one hundred maps also made me realize that there is a such thing as slicing the data too fine. My dataset started with ten thousand datapoints, but when searching for a relationship between hit-and-run bike accidents and time of day, I was left with six datapoints (sketch C). At this level, it is impossible to find a relationship that is statistically significant. The One Hundred Sketches exercise was productive in that it generated new theories and ideas for future information graphics.