The Massachusetts Bay Transportation Authority is expected to announce a 30-day shut down of the Orange Line on Wednesday to address long overdue maintenance, sources tell 5 Investigates. Subscribe to WCVB on YouTube now for more: http://bit.ly/1e8lAMZ Get more Boston news: http://www.wcvb.com Like us: https://www.facebook.com/wcvb5 Follow us: https://twitter.com/WCVB Instagram: https://www.instagram.com/wcvb5/