[wtvanhest]

I'd guess from your comment that don't likely live in Boston or have spent very little time here.

The way the city is set up, the T lines basically just run out toward other stuff. Only when you are in downtown can you find multiple lines close so most of the time you have only one option if any.

Check this map out: http://mapsof.net/map/boston-metro-map#.UVnvrodOTYg

In NYC, you can usually walk to different lines quickly.

There may be express trains in Boston, but I don't know of any??? I don't use the T to commute, so maybe someone else knows?

[evanb]

There aren't express trains, but it would still be useful to have some weekend service posted, especially for the green line (of which there are 5 once you get west enough!).

[myke_cameron]

There ARE express trains, they're just not scheduled in advance (for example the b line goes express from bu east to Washington to make up for delays quite frequently).