 Menlo Park residents who had bought houses near the 1910 tracks (which had not seen rail service since 1982) were concerned about the possibility of train noise and potential freight use, despite Dumbarton Rail Corridor plans for the use of only passenger trains.By March 2006, the estimated cost had increased again to .The 2006 "Environmental Phase 1" report studied four alternative rail alignments and two alternative bus services to determine the most feasible options.