Editing MBTA Commuter Rail (section)

{{Short description|Greater Boston commuter rail system}}
{{Use mdy dates|date=December 2022}}
{{Infobox public transit
| box_width = 
| name = MBTA Commuter Rail
| image = Diesel fumes from departing Fairmount Line train at Morton Street.jpg
| caption = A [[Fairmount Line]] train at {{bts|Morton Street}} in 2024
| imagesize = 300px
| alt = A diesel locomotive pushing a passenger train out of an urban station
| owner = [[Massachusetts Bay Transportation Authority]] (MBTA)
| locale = Eastern [[Massachusetts]] and central [[Rhode Island]]
| transit_type = [[Commuter rail]]
| lines = 12
| stations = [[List of MBTA Commuter Rail stations|142 active; 6 currently closed]]
| daily_ridership = {{American transit ridership|MA Boston CR daily}} ({{American transit ridership|dailydate}}){{American transit ridership|dailycitation}}
| annual_ridership = {{American transit ridership|MA Boston CR annual}} ({{American transit ridership|annualdate}}){{American transit ridership|annualcitation}}
| website = {{URL|mbta.com/schedules/commuter-rail}}
| began_operation = {{ubl|1834 (first lines open)|1965 (beginning of MBTA subsidies)|1973 and 1976 (MBTA asset purchases)|1977 (full consolidation)}}
| operator = [[Keolis]] Commuter Services
| marks = MBTX
| vehicles = 110 diesel locomotives, 475 coaches
| system_length = {{convert|429|mi|km|abbr=on}}
| track_gauge = {{Track gauge|ussg|allk=on}}
| minimum_radius_of_curvature = <!-- {{convert|0|ft|0|in|mm|0}} -->
| average_speed = <!-- {{convert|0|mph|km/h|abbr=on}} -->
| top_speed = {{convert|79|mph|km/h|abbr=on}}
| map = {{switcher
|{{maplink-road
|from1=Newburyport/Rockport Line.map
|from2=Haverhill Line.map
|from3=Lowell Line.map
|from4=Fitchburg Line.map
|from5=Framingham/Worcester Line.map
|from6=Needham Line.map
|from7=Franklin/Foxboro Line.map
|from8=Fairmount Line.map
|from9=Providence/Stoughton Line.map
|from10=Fall River/New Bedford Line.map
|from11=Kingston Line.map
|from12=Greenbush Line.map
}}
|Show interactive map
|[[File:MBTA Commuter Rail Map.svg|300px|frameless]]
|Show static route diagram
<!--|[[File:MBTA Commuter Rail and funding district map.svg|300px|frameless]]
|Show static map-->
}}
| map_state = 
| map_name = MBTA Commuter Rail system maps
}}

The '''MBTA Commuter Rail''' {{reporting mark|MBTX}} system serves as the [[commuter rail]] arm of the [[Massachusetts Bay Transportation Authority]]'s (MBTA's) transportation coverage of [[Greater Boston]] in the [[United States]]. Trains run over {{convert|429|mi|km|abbr=on}} of track on 12 lines to 142 stations. It is operated under contract by [[Keolis]].

In {{American transit ridership|annualdate}}, the system had a ridership of {{American transit ridership|MA Boston CR annual}}, or about {{American transit ridership|MA Boston CR daily}} per weekday as of {{American transit ridership|dailydateasof}}, making it the [[List of United States commuter rail systems by ridership|fifth-busiest commuter rail system in the U.S.]], behind the three New York-area systems and the [[Metra|Chicago-area system]]. The line's characteristic purple-trimmed coaches operate as far south as [[North Kingstown, Rhode Island]], and as far north as [[Newburyport, Massachusetts|Newburyport]] and as far west as [[Fitchburg, Massachusetts|Fitchburg]], both in [[Massachusetts]].

Trains originate at two major [[Terminal station|terminals]] in [[Boston]] – [[South Station]] and [[North Station]]. The only connection between the two halves of the system is the non-revenue [[Grand Junction Railroad and Depot Company|Grand Junction Branch]]. The [[North–South Rail Link]] is a proposed tunnel between North Station and South Station to allow through-running service.