This map shows locations of all pedestrians killed in traffic accidents between 2008 and 2012.
The Vision Zero traffic-safety campaign depends on using data to identify dangerous conditions. Now that data is getting even better.
Two dozen states are now working with federal officials on programs that use data to determine which intersections or roads are the most deadly and how to use low-cost fixes to make them safer.
View maps of a few of the nation's deadliest places for pedestrians.