I have been looking for something like this. To clarify it doesn't show pedestrians or bikes hit by cars? ( I live near a stretch of road that I know has several white bike memorials but this does not see to not have them there..)
There's a pedestrian fatality on the map near me. Might be a problem with data gathering/consolidation - apparently data collection is done by individual states (and of course they're themselves distributing it out to a huge number of different counties/municipalities/PDs).