Washington, DC is getting a new Metro map, and some new services. Called Rush Plus, it's designed to add additional service to existing lines and to change the rush-hour routing of some trains so that you can make more connections without a transfer.
The full Metro map is here, in all its PDF glory; the sample below is hoped to be a reasonable size. Express Night Out's DC Rider columnist Vicki Hallett has a story, Mix and Map, about what's new. Note the extended Yellow line service, the split Orange line along Blue routing, and a split Yellow line along Blue routing.