Charlie BreitroseAn MBTA bus in Watertown. The MBTA has proposed some major changes to its bus service, including more frequent runs for the 70 Bus and the addition of two routes: one serving Newton and Waltham, and another that goes from Riverside Station in Newton to Arlington and includes Belmont. The changes are part of the Better Bus Program, the MBTA’s proposal to revamp parts of the bus system to meet the changing needs of the Greater Boston area due to shifting demographics, new employment centers, increased traffic congestion and changing travel patterns, according to the MBTA’s website. Recently, the MBTA released a proposed map of the new bus routes (click here to see an interactive map). The changes impacting Watertown include increasing the frequency of the 70 Bus from the current service, every 30 minutes or less during midday and on weekdays, to every 15 minutes or less seven days a week under the proposed plan.