San Diego MTS launches Copper Line LRT service, US September 30, 2024 | News, North America News The San Diego Metropolitan Transit System (MTS) has launched a light rail transit (LRT) service on the 6.1-km-long Copper Line–East County Connector on September 29, 2024. It will provide connectivity... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password