I would argue for removing this terminology from the site. While *some* (by no means all) MTA maps use these colors, the actual phrases "Blue Line" and "Yellow Line" are used nowhere in MTA literature, and not particulalrly often by actual riders of the system either. --Jfruh (talk) 18:03, 10 April 2007 (UTC)
The MTA uses it in their 2005 annual report:  It doesn't seem to be used very much; is there an alternate term? --NE2 18:43, 10 April 2007 (UTC)
That two-year-old report is very much an exception, and there really isn't much of an alternative nomeclature. Because the vast majority of the system is served by both lines, most people just think in terms of the destinations of the trains (i.e. Timonium trains, BWI trains, etc.).
We might for guidance look at the articles on the various London Underground lines that have multiple endpoints, as they may be the transit service that most resembles this set-up. --Jfruh (talk) 19:26, 10 April 2007 (UTC)
I like the way you tweaked it. --Jfruh (talk) 12:54, 12 April 2007 (UTC)