[Case Study] Biking: Road Safety: Washington DC

According to the combined data of the traffic safety statistics of 2013-2015 from DDOT and the crash data from Open Data DC, there were 707.4 bike crashes per year in average between 2012-2016, where 46.8 bicyclists were fatal or major injured and 436.6 were minor injured.

• “Examining travel patterns and characteristics in a bikesharing network and implications for data-driven decision supports: Case study in the Washington DC area,” Journal of Transport Geography, vol. 71, 2018.
  

  @Article{Xie2018Bike,
  Title = {Examining travel patterns and characteristics in a bikesharing network and implications for data-driven decision supports: Case study in the {Washington DC} area},
  Author = {Xiao-Feng Xie and Zun-Jing Wang},
  Journal = {Journal of Transport Geography},
  Volume = {71},
  Pages = {84--102},
  PDF={http://www.wiomax.com/team/xie/paper/JTRG18Pre.pdf},
  Doi = {10.1016/j.jtrangeo.2018.07.010},
  Year = {2018}
  }

From spatial analysis, the broad spatial distribution of crashes certainly gives a warning that bike safety requires a significant improvement. The heatmap of crashes provides us a visual summary of the most frequent crash regions. We also identified the significant crash hot spots, using the method of Z scores from the Getis-Ord Gi* statistic with 99% confidence. By including the trip demand information, we found that the hot spots of bike crashes have a strong spatial correlation with trip demand.