Massachusetts residents age 75 and older who no longer drive will be eligible for free rides on the MBTA under a pilot program launching this week. Applicants need a valid Massachusetts ID. Applications are available online through the MBTA’s senior CharlieCard program. The program’s eligibility is limited to older adults who have stopped driving. The MBTA has not provided further details in the available announcement about the pilot’s duration or how many riders it expects to serve.