I doubt that lane splitting is the problem in California. BTW, we have more than 10% of the population, and we have surely more than 10% of the motorcycles, PLUS, we use them year round. I mean, in Minnesota an average motorcycle gets about 1/5 of the use of a typical California bike. I bet if we did an average of accidents per miles traveled we would do OK. Lane splitting is only a real problem when you insist on lane splittng at 65 mph when the traffic is going 5 mph. If you are careful, it's OK. Most accidents are still of the car turning left in front of you variety (saw one yesterday, unfortunately). If other states do not want lane splitting is just because of an irrational fear, not because of solid data.