United States: Trends in METRORapid ridership in Houston, Texas November 1, 2021 | Data & Statistics The METRORapid is a bus rapid transit (BRT) system in Houston, Texas. It currently operates one line, Silver Line, which connects the uptown area of Houston to Post Oak Boulevard. The system began ope... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password