Ricardo appointed as ISA for GTHA rail upgradation project, Canada May 25, 2022 | Company News, News, North America Company News, North America News Ricardo has been appointed as the Independent Safety Assessor (ISA) for the upcoming upgradation of rail transit across the Greater Toronto and Hamilton Area (GTHA), Ontario, Canada. The contract was ... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password