Starting in September, the Massachusetts Bay Transport Authority (MBTA) will keep buses at popular T stations running until 2:30 a.m. on Friday and Saturday nights as part of a one-year pilot program to test the financial viability of late night public transportation.

Now, Cambridge Representative Alice K. Wolf is pushing to keep both buses and subways running late seven days a week.

Yesterday at 10 a.m., Wolf presented a bill to the legislature’s Joint Committee on Transportation proposing that the T remain open until 2:30 a.m. every day.

But members of the committee say they’ll probably adopt a wait-and-see approach.

“I think what’ll happen is we’ll probably hold this [bill] until it [the pilot program] works out,” said Robert A. Havern ‘73, Senate Chairperson of the committee, in an interview yesterday.

The MBTA pilot program—which has been planned for four years—will start with buses rather than the subway for cost reasons.

“Most of our buses are much more energy-efficient [than subway cars],” Havern said.

Many of the late-running buses will cover heavily-trafficked areas, including those used by Harvard students.