The Erie Canal ran from Albany through Watervliet and then turned west. The Troy and Boston tried to tap some of that traffic off the Erie Canal to head to Boston and overseas. In Fitchburg Railroad and Boston & Maine days, up until the USRA took control of the railroads during World War I, the Boston & Maine offered a variety of routings to Buffalo, Chicago and St. Louis bypassing Albany entirely. The route was to Rotterdam Jct. then the West Shore, probably all the way through to Buffalo, but as the West Shore diminished in importance and 3rd rail electrics dominated the Utica to Syracuse West Shore route, the trains with through cars off the B & M were routed ontothe Water Level Route at Utica. West of Buffalo, the through cars were conveyed to their destinations via the Wabash, Nickel Plate, probably the Grand Trunk, secondary passenger routes. Most the the through services were tourist sleepers and some did not run daily. They appealed largely to tour groups rather than business travel. They were deemed unecessary during WWI so except for a Buffalo car, were discontinued by the USRA. Also, since the only serious choice at either Rotterdam Jct. or Albany was the Central, I think the NYC called the shots. The through cars at Rotterdam Jct. were coupled into West Shore trains that had originated in Weehawken, NJ.