[sirkingwilliam]

I think there needs to be lines that connect large business areas or medical areas with downtown.

Red line: Downtown to the Medical Center (maybe up to La Cantera/The Rim)
Green line: Downtown to Westover Hills
Purple line: Downtown to the airport (then maybe to Stone Oak)
Silver line: Downtown to arena district
Orange line: Downtown to Brooks City Base
Blue line: Downtown to Port San Antonio and ending at Toyota or A&M-SA

6 lines that would virtually connect downtown with all the major suburban areas.

Also, a long shot here, but:

Plum line: downtown to New Braunfels (while connecting with Windcrest/Rackspace and Schertz/Cibolo).

downtown with Toyota with Port San Antonio and downtown