The MTA bus driver who struck and killed a woman in an alleged hit-and-run last week was sprung on $20,000 bail Monday — just as he learned he had been indicted.

Paul Roper, 48, is expected to be released from Rikers Island nearly a week after striking Carol Bell, 70, with his B15 bus on Nov. 3.

A Brooklyn grand jury indicted him on felony charges of leaving the scene of an accident.