Springfield to Boston Overview

The Alt 7 East/West High-Speed line would start at Springfield Union Station.
The Pittsfield to Springfield portion could be any of the first six proposed alternatives by the 2019 East-West Rail Study Advisory Committee.
The first section would run above ground, approximately 13 miles, on existing track, to Palmer where it would enter the portal for the first tunnel (TMT#1).
At Palmer it would go underground and immediately come to the Palmer station.
The TMT#1 would continue beneath the Massachusetts Turnpike for approximately 30 miles to a portal in Auburn. This section is where it could reach speeds of 150+ miles per hour.
A Maintenance/Emergency access facility would be located at Route 84.
Emerging in Auburn it would proceed above ground on existing track, between 2-5 miles to Worcester Union Station.
After Union Station it would immediately enter another portal for the second tunnel (TMT#2) and travel beneath existing rail right of way, Shrewsbury Street and Route 9 to the 495 Station, approximately 12 miles.
From 495 Station it would continue beneath Route 9 and the Massachusetts Turnpike to Logan Airport, approximately 28 miles. Again, this is where it could reach speeds of 150+ miles per hour.
Between the 495 Station and Logan Airport there would be a Maintenance/Emergency access facility at Route 95/128, Stations at West Station (Beacon Yards), Back Bay, South Station and Seaport Station.
It would connect with the North/South Rail tunnel at Back Bay Station and split off after South Station to a new station at the Seaport and then onto Logan Airport.
An additional station possible with tunnel extension to Suffolk Downs redevelopment.