Maine Central Railroad main line

Through the early 20th century, the main line was double track from South Portland to Royal Junction, where it split into a lower road through Brunswick and Augusta and a back road through Lewiston which converged at Waterville into single track to Bangor and points east.

[2] This historical description does not include changes following purchase of the Maine Central Railroad by Guilford Transportation Industries in 1981 and subsequent operation as part of Pan Am Railways.

[1] The Penobscot and Kennebec Railroad was chartered in 1845 and completed a Portland gauge line from Waterville to Bangor.

[1] Canadian Pacific's transcontinental route to Saint John, New Brunswick, included trackage rights over the (former European and North American Railway) Maine Central Eastern Division main line from Mattawamkeag to the Canada–US border.

Maine Central mileposts east of Waterville computed mileage via the lower road.