This repository contains data on traffic fatalities by U.S. Congressional district.
Data is for 2015 and sourced from the National Highway Transportation Safety Administration's Fatality Analysis Reporting System. The 2015 crash fatalities were joined to the 115th Congressional Districts from Cicero.
Link to public map: https://azavea-maps.carto.com/u/east/builder/62189332-7111-11e6-b0bf-0e3ebc282e83/embed
Blog on the topic: https://www.azavea.com/blog/2016/09/02/2015-fatal-crash-data-by-congressional-district-released/