This is a plan to enable High Speed Rail share tracks with Caltrain. It was first proposed by Congresswoman Anna Eshoo, State Senator Joe Simitian and Assembly Member Rich Gordon. In contrast of High Speed Rail’s initial proposal for an elevated 4-track structure the length of the corridor, with separate tracks for HSR trains, requiring expansion beyond the existing right of way, the “blended system” is intended to stay primarily within the Caltrain right of way and use primarily the existing two tracks.