METRO receives first H4 LRV from Siemens, US December 20, 2022 | News, North America News The Metropolitan Transit Authority of Harris County (METRO) has received the first of 14 new fourth-generation (H4) light rail vehicles (LRV) which will be deployed on the METRO Rail Red Line. The ra... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password