Does anyone think the DMU service proposed in the MBTA's Capital Investment Plan will be frequent enough/priced appropriately to negate the need for the Blue Line extension? Will DMU+ferry be enough?
Lynn deserves rapid transit, just like Quincy. Lynn doesn't just need service into Boston, but service to get around and into the city.
That said, the DMU could be used while constructing the infastructure needed for the blue line in bits and pieces.
1) Build two layover tracks on the former marblehead line after swampscott, extend DMU service there.
2) Reopen East Lynn station and relocate Riverworks/West Lynn further east so its useful and can spawn some TOD. Possibly add a station at Oak Island
3) Rebuild the old freight branch to Airport, allowing a cross platform transfer to the Blue Line, Chelsea Silver Line and Massport shuttles. (This is where most of the BL extension plans not using the Point of Pines routing have it splitting off). Also possibility for a station for Revere at the Junction near Winthrop St. Also allows headway increases since you no longer have to deal with Chelsea.
4) Begin quad tracking between Eastie and Swampscott
5) Convert it over to the blue line!
6) Get the blue line to Salem, figure out how to send the DMUs to Danvers.
1, 2 and 3 can all happen at the same time or in a different order.