MBTA on Instagram: "During the ongoing Green Line diversion, we’re modernizing some of our oldest infrastructure for safer, more reliable service. While we’re working around the clock, we’re keeping riders moving with free Routes 39 & 57, free shuttle buses, and the Orange Line through December 22. Find the best alternate route for you during the Green Line diversion at mbta.com/GreenLine #MBTA #publictransportation #maintenance #Boston #update"