The color(s) red, orange, blue, green, purple, gray, light blue, brown, black and white is/are claimed as a feature of the mark.
The mark consists of a transit map with a black letter "T" in the upper left corner enclosed in a white circle with a black circle border. To the right of theletter "T" is the wording "MASSACHUSETTS BAY TRANSPORTATION AUTHORITY" in black, above the wording "RAPID TRANSIT/KEY BUR ROUTES MAP in black. Beneath and to the right of this wording is a map composed primarily of bold geometric lines in orange, red, blue, green and gray, which intersect with thinner purple and brown lines. Beneath the lines are light blue and white geometric shapes. There are small white circles and purple squares spaced on or next to the geometric lines, as well as wording in black next to the lines, listing various station stops. The map also contains wording concerning various locations near the station stops in black and white lettering inside orange, blue, green, yellow and gray oval shapes.