The original report at
http://phoenix.gov/STREETS/2007bike.pdf

=v= As usual, based on police reports and thus subject to
the observer bias of police and, in the case of fatalities,
survivor bias. So the "at-fault" numbers and charts are
completely meaningless, but will of course be used to prop up
the usual entrenched opinions anyhow. The other stats are of
more value, of course, though they depend on how much forensic
work the police decide to do when a bike is involved.
_Jym_