The study is a big tick for lane filtering which has been a controversial issue in several countries recently. NSW has adopted a lane-filtering system with some caveats, the current Victorian Government has rejected it while the opposition supports it and Queensland is about to make a decision on filtering.
In the USA, California is the only state with legal lane splitting, but several other states are now considering its benefits such as less congestion, lower pollution, easier parking, etc.
The examined 7836 motorcycle crashes, of which 1163 occurred while the rider was splitting lanes.
It found that of those who crashed while lane splitting 45% suffered fewer head injuries, 21% had fewer neck injuries, 32% received fewer torso injuries, 12% got fewer arm/leg injuries, and there were 55% fewer fatalities.
Surely this is evidence that lane splitting works. It largely reduces incidences of rear-ender crashes which are the biggest type of crash involving motorcycles at anywhere up to 40% of all bike crashes.
It found that lane-filtering crashes occurred at up to 50km/h and that the safest speed to filter is less than 16km/h above the speed of the surrounding traffic. Injury rates jumped substantially at higher speed snap higher speed differentials.