 A 1991 study sponsored by SMCTA, the "Dumbarton Commuter Service Feasibility Study" (Parsons Brinckerhoff) recommended a rail option along the former Dumbarton Cut-off as a long-term strategy.Pursuing this strategy, SamTrans purchased the entire right-of-way for in early 1994, with the help of a loan from Caltrans.More studies followed in 1996 ("Dumbarton Rail Corridor Rehabilitation", Morrison Knudsen), 1997 ("Dumbarton Corridor Study", Parsons Brinckerhoff), and 1998 ("Dumbarton Corridor Transit Concept Plan"), which concluded that trans-Bay rail was viable as a long-term strategy and expanded bus service could serve as a short-term strategy.