Hi,
another method that is used is to have a IR beacon on each bike (different code for each bike) and decode that as it goes by, The typical data rate (38Khz) might give you accuracy problems though.
Hi Dwayne, Yes 760MPH is around the speed of sound, It was broken on 15th October 1997 on the Black Rock desert in Nevada by a British team using a twin Jet powered car - Thrust SSC. I was on the team, see,
http://www.thrustssc.com/thrustssc/Team/team.html
There were a couple of PIC's on board, but no PBP!

Robert G8RPI.