Image via vanshnookenraggen (Click to enlarge)

A great find today from CP of a bird’s eye view of the Boston Rapid Transit System back in the 1940′s and 50′s. According to the image description, this version of the map is a bit different than today’s Boston T map because the lines shown here are of a different color than what they are today (today’s Red Line was blue, today’s Orange Line was red, and today’s Blue Line was orange).

The current colors were switched during a system wide rebranding when the MBTA was created.