MBTA February 22, 2017 8:20 pm What's Behind the MBTA's Signal Problems? Signal issues appear to be a recurring problem for the MBTA. NBC Boston’s Natasha Verma took a closer look at the MBTA’s signal shop and discovered the issues could have to do with old equipment. US & World Videos 3:44 What you need to know about kids with autism 1:58 Virginia man granted bail in Turks and Caicos ammo case 1:42 Ashley Judd speaks against expansion of Hanscom Field 2:39 Student protesters in Boston face new threats 1:17 Latest on the Karen Read trial: First responders testify