Upgrade of full Red Line fleet could boost capacity, reduce wait times

BOSTON — The bustling Red Line, the MBTA's busiest subway line, could transport an additional 10,000 passengers an hour and keep the time between trains to about three minutes if the agency upgrades the line's entire fleet, according to T projections.
The 50 percent boost in capacity would mean less congestion, especially in the system's downtown Boston core, for the 150,000 riders who rely on the Red Line to get where they're going each day. And demand is on the rise as more housing is built near Red Line stations in Quincy, Dorchester and Cambridge's white-hot Kendall Square market.