Sound Transit awards consultancy contracts for I-405 BRT and SR 522 BRT February 23, 2018 | North America News Sound Transit has awarded consultancy contracts for the I-405 and SR522 bus rapid transit (BRT) projects. The projects are part of the Sound Transit 3 Plan. Commercial services on both BRT systems are... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password