http://web.mit.edu/facilities/transportation/shuttles/safe_ride.html

The Parking and Transportation Office operates MIT's safety shuttle service, known as Saferide. Saferide provides a safe means of transportation at night within and around the MIT campus. This is a free service and is available to all members of the MIT community.

The Saferide vehicles are driven by service assistant employees of Standard Parking, who maintain direct communication to the Saferide Office and the MIT Police.

Saferide operates two schedules: a regular schedule when classes are in session and a holiday/summer schedule. Hours of operation are from 6 PM to 2:30 AM Sunday through Wednesday and 6 PM to 3:30 AM Thursday through Saturday.