Nine years after pulling the plug on a prior weekend late-night service program, the MBTA this month will begin running all subways and several popular bus routes about an hour longer into the night. It's part of a new fall schedule that also boosts daytime trip frequency across most of the system.

Bus Routes 1, 15, 22, 23, 28 and 31 will become Frequent Bus Routes, with service at least every 15 minutes from 5 a.m. to 1 a.m. every Monday through Saturday and from 6 a.m. to 1 a.m. on Sundays.