Photograph of subway service changes by jschumacher on Flickr Perhaps because the MTA signs trying explain weekend subway service diversions are confusing--like this weekend F service sign--the MTA has put up some maps to try to explain changes, too. For instance, here's a map explaining service updates for the 2 and 5 lines. While the 2 usually goes up the West Side and the 5 the East Side, the uptown 5 is running on......