San Diego MTS procures battery-electric buses for Iris Rapid Route, US October 11, 2021 | North America News The San Diego Metropolitan Transit System (MTS) has procured 12 60-foot battery-electric buses from New Flyer to operate on the Iris Rapid Route, which is an extension of the bus rapid transit (BRT) n... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password