A-Train services from Dallas to DART Green Line to start on June 20 May 16, 2011 | North America News Service on the 33.8-km A-Train commuter line between Denton and the DART Green Line station at Trinity Mills in Carrollton is expected to begin on June 20, 2011. Construction on the project has been c... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password