Aren't those decreases just about proportional to the drop in new motorcycle sales over these last few years?
I'm too lazy to get to the bottom of it, but I have a strong suspicion any reductions in accidents and fatalities are due to fewer new riders on the road, and not due to more courteous and vigilant drivers.
Motorcycle fatalities fell 29% from 2008 to 2009. Motorcycle sales fell quite a bit in 2009 but I can't find the number its on my desk here somewhere. We also had a very wet year in California in 2009 which could have played a role in reducing fatalities. If you look below at how many bikes were registered in CA and how many licensed riders we had comparing across the years those numbers didn't drop significantly from 2008-2009.
There is no way we can attribute gains or losses in motorcycle fatalities to any one factor. There are too many variables. The important thing (or maybe sad thing) to note is that the number of motorcyclists killing themselves in California continued to increase over a decades time, when during that same period overall traffic fatalities fell significantly. This has drawn the attention of a lot of folks across a wide span of the government both at the national and state level. There has been a call to arms and a wide variety of agencies, groups, and departments have been working to find ways to reduce motorcycle fatalities.
Year
Motorcyclist fatalities
Motorcycle Registrations (1000s)
Licensed Motorcycle Drivers (1000s)
Motor Vehicle Registration (100,000s)
Licensed Drivers (100,000s)
Total CA Fatalities
Motorcycle Percent of Total fatalities
2000 276 450 864.8 247.1 214 3,753 7.35%
2001 299 495.3 906.1 254.7 219.8 3,956 7.56%
2002 324 536.1 948.3 264.9 226.1 4,088 7.93%
2003 383 569.2 975.7 264.2 226.9 4,224 9.07%
2004 432 641.9 1015.5 282.6 228.4 4,120 10.49%
2005 469 680.9 1055.4 281.3 229.3 4,333 10.82%
2006 506 732.5 1109.7 287.1 232.4 4,240 11.93%
2007 518 772.5 1161.9 289.1 236.3 3,995 12.97%
2008 560 824.2 1211.8 286.6 237.2 3,434 16.31%
2009 395 809.1 1248.5 276.8 237.6 3,081 12.82%
2010 ?? 808.6 1275.7 ?? ?? ?? ??