This is a brief summary of the rules for taking bicycles on Massachusetts Bay Transportation Authority system. Visit the MBTA for more complete information.
| Subway | Weekdays before 7 a.m., between 10 a.m. and 4 p.m., and after 7 p.m. Weekends any time. Only 2 bikes per car. | |
| Trolley | Not allowed on Green Line and Mattapan High-speed lines. | |
| Bus | Bikes allowed only on external racks on select buses. Go to www.mbta.com for a list of buses. | |
| Commuter Rail | All trains except during weekday peak hours in the peak direction. | |
| Ferry Boat | Allowed at all times. | |
| Folding Bikes | Folding bikes allowed on all MBTA vehicles including Subway, Green Line, Commuter Rail, Ferries and Buses, at any time when folded. Carrying cases not required. | |
