After this week’s PACB approval, construction on Phase 1 of Moynihan Station will begin in October. With a tortured history that rivals many of New York City’s late-20th Century transit expansion plans, a firm start date for the project is good news indeed. Phase 1 is a $267-million expansion plan for Penn Station, and it is expected to be completed by 2016. When the $1.5-billion Phase 2 will get off the ground is anyone’s guess, but when the project is finally completed, New Yorkers will enjoy a much airier and roomier commuter rail hub, evocative of the old Penn Station. Issues concerning track capacity into and out of New York City will not be addressed.