In this Thursday, May 26, 2011 file photo, a motorcyclist rides between lanes as traffic backs up on US highway 101 before the start of the Memorial Day weekend in Mill Valley, Calif.
In this Thursday, May 26, 2011 file photo, a motorcyclist rides between lanes as traffic backs up on US highway 101 before the start of the Memorial Day weekend in Mill Valley, Calif. Eric Risberg AP
In this Thursday, May 26, 2011 file photo, a motorcyclist rides between lanes as traffic backs up on US highway 101 before the start of the Memorial Day weekend in Mill Valley, Calif. Eric Risberg AP