Submitted by Linda, who says:

MBTA Red Line Order of Stations (Harvard to Ashmont) sign on old retired Red Line car, Transit Day 2017, Seashore Trolley Museum, Kennebunkport, ME.

Transit Maps says:

A diagram of services along a rail line is – in its most basic form – nothing more than a list of stations served, so this sign actually works quite efficiently. It’s also similar to many railroad timetables, which read down for service in one direction and up for the other. The one quibble I have with this is the use of general regions for the final destination, rather than the name of the terminating station. As it stands, people with little familiarity with the Boston area might have thought  that there was a station called “Dorchester” past Ashmont at the southern end of the line.