Traffic congestion in Nation and it continues to increase. One inexpensive, simple, effective, and immediate way to reduce traffic congestion is to permit motorcyclists to travel between two slow moving lanes of traffic. Doing so adds capacity to every existing four-lane road in the entire Nation. In California where "lane-splitting" is legal, common place, and has been found to enhance motorcycle safety, it is embraced as a significant component of traffic congestion reduction.
Proponents of lane splitting state the Hurt Report of 1981 reached the conclusion that lane splitting improves motorcycle safety by reducing rear end crashes.The NHSTA does say, based on the Hurt Report, that lane splitting "slightly reduces" rear-end accidents.