The MBTA has made adjustments in the latest draft of its massive Bus Network Redesign project, but Charlestown State Representative Dan Ryan still has concerns about how the changes will impact some of his community’s most vulnerable residents. While the MBTA could not incorporate every change that was requested, Johnson said the new bus network is just as was proposed in May in that it would still increase service by 25 percent across the network and double the number of high frequency corridors (defined as a bus leaving a stop at least every 15 minutes, seven days per week) across the system.