Name of Route: Boston MTA/MBTA Cambridge Dorchester Line (Red Line)

Version and Release Date: Beta 0.1 9 April 2022

Description: Boston MTA/MBTA Cambridge Dorchester Line (Red Line) by Jonathan DandridgeFor Open Rails/MSTS The line as it was in the 1960s but with addition of the Quincy Branch as
of the 1970s. Includes the Mattapan Ashmont Trolley, NHRR Milton Branch and portion of the Old Colony Main
for freight switching.

Installation Method: Zip File

Size of Download: 835 MB

Size of Installed Route: 1.34 GB

Prototypical or Freelance Operations; Mainline, Branch, Switching: Prototype rapid transit line, freight branch

Freight or Passenger: Both

Era or Genre: 1960s to 1970s

Location: Boston and Cambridge MA

Length of Mainline: about 12 miles

Length of Branches: 4 miles

Number of Branches: 2

Number of Sidings: NA

Number of Yards: 3

Mixture of Dual and Single Track: Rapid Transit and trolley all double track; freight branch single track

Level of Trackside Detail: moderate

Percentage of Scenery Completed: 80%

FPS Specs, with qualifiers: over 60

Activities Provided:

  • Ashmont to Harvard stopping at all stations using pre 1963 older equipment.
  • Harvard to Ashmont stopping at all stations using pre 1963 older equipment.
  • Harvard Yale football special – runs from Ashmont to Harvard stopping only at principal stations then on to the special Stadium station in Eliot Yard used for access to the Harvard stadium, which was actually located across the river in Boston. This is siomewhat fictional and not based on any documented operation.
  • Cabot Yard to Quincy Center – simulating a train entering service in the early morning, using Redbirds.
  • Harvard to Quincy Sq stopping at all stations (express from Andrew to North Quincy), using Redbirds.
  • Quincy Sq. To Harvard stopping at all stations (express from North Quincy to Andrew), using Redbirds.
  • Mattapan – Ashmont – Mattapan round trip using ex Dallas PCC.
  • PCC Tow – A 2 car train of 0700 cars tows a PCC from Ashmont to Eliot Yard. This was how PCC's were maintained until a facility was built at Mattapan in the 1970's.
  • Milton Branch freight from Southampton St. Yard to Milton, switching the Baker Chocolate complex.

Non-Default Consists or Rolling Stock Required in Activities: see equipment list. All can be downloaded at

Add-In Track Sets: Xtracks

Xtracks Required?, Version: 3.20

Newroads Required?, Version: 4

Tsection.dat Build: 41

Payware or Freeware: Free. Custom objects restricted use.

Known Problems: This is a Beta release.
Interlocking and tunnel signals are not correct for the Cambridge Dorchester line. I hope to have more accurate signals in a future release.

Missing signals before and after Andrew Station inbound due to a world file problem that prevents them from being added.

Some scenery needs work particularly in the Charles station area. Some stations are still bare bones, I hope to have more detail in a future release.

In a couple of places there are objects in the sky I have not been able to delete, particularly a rogue carspawner that appears on the South Shore line just North of the Southeast expressway crossing.

Where it can be downloaded:, uploaded 9 April, will be a few days before it is available.