an old colony line question

hey everyone, i just thought about this today during class, was the old colony originally just a single track mainline used by CSX to Braintree and then the T just replaced all the track

was there still rail between South Station and Braintree before the old colony projects started or did they have to lay it all down? does that make sense?

when did the T start construction on the old colony project ?

1. In New Haven RR days, it was basically four tracks to Atlantic (milepost 5.49 from South Station, near the Neponset River bridge), then double track through Quincy to Braintree and beyond.

2. Prior to Red Line construction, there was a single active freight track along the entire route, although the line was broken at the old Neponset River bridge, which had burned in 1960, shortly after passenger service had been discontinued. All but one track had been removed north of the bridge. There was still some double track through Quincy.

3. Red Line construction began with an official groundbreaking in 1966 and it was completed to Braintree in 1980. The work that led to the restoration of Old Colony passenger service began in the early 1990s.

3. Red Line construction began with an official groundbreaking in 1966 and it was completed to Braintree in 1980. The work that led to the restoration of Old Colony passenger service began in the early 1990s.

Which was around 92/93, so that would be 4 years that it took to get that third track along the Red ine.

Also, South of the Red Line's Anderson Bridge, there was no third track in the 1980s from the Anderson aforementioned flyover till just south of Quincy Adams, but it was placed around 1996.