“I understand there are budget concerns. But for me this is a quality-of-life issue,” said Sarah Kaplan, 32, who was born with cerebral palsy and uses a wheelchair. She rides a vehicle operated by the Massachusetts Bay Transportation Authority to get to and from her job as internship coordinator with the Boston Center for Independent Living. “I want the right to leave my house like everyone else,” Kaplan said. In 2012, the MBTA doubled fares from $2 to $4 for The Ride, triggering protests; several people chained their wheelchairs together and blocked traffic. Fares were later rolled back to $3 for most rides.