Service Alert for this weekend. Please be advised that the Blue Line subway will be suspended in both directions between Central Station and Northwood Station from Saturday morning until Sunday evening. This temporary closure is necessary for critical track maintenance and signal upgrades to improve service reliability. During the closure, free shuttle buses will operate between the affected stations. Look for the designated bus stops outside each station entrance. Please allow for extra travel time as the shuttle service will likely be slower than the train. We appreciate your patience as we work to enhance our transit system.