Yes, lane splitting is legal in California for motorcyclists. California was the first state to legalize lane splitting to reduce traffic congestion. Motorcyclists can split lanes as long as it is safe to do so. However, bikers must travel no faster than 15 mph over the speed of other motorists and avoid lane splitting when traffic is traveling 30 mph or faster. Although other states have considered legalizing lane splitting, it is still illegal in most parts of the country.