The Blue Line is a rapid transit line in the Greater Boston metropolitan area, one of four rapid transit lines operated by the Massachusetts Bay Transportation Authority (MBTA). It runs from Bowdoin station in downtown Boston under Boston Harbor to East Boston and Revere on the inner North Shore, where it terminates at Wonderland. The stop at Airport Station, by way of a free shuttle bus, is one of two rapid transit connections to Logan International Airport. In 1967, during a systemwide rebranding, the line was assigned the blue color because it passes under the Boston Harbor. With an end-to-end travel time of less than twenty minutes, the Blue Line is the shortest of Boston's heavy-rail lines and the only line to have both third rail and overhead catenary sections.
The Silver Line is a system of bus routes in Boston and Chelsea, Massachusetts, operated by the Massachusetts Bay Transportation Authority (MBTA). It is operated as part of the MBTA bus system, but branded as bus rapid transit (BRT) as part of the MBTA subway system. Six routes are operated as part of two disconnected corridors. As of 2023, weekday ridership on the Silver Line was 27,000.
The Harbor Subdivision is a single-track main line of the BNSF Railway which stretches 53 miles (85 km) between rail yards near downtown Los Angeles and the ports of Los Angeles and Long Beach across southwestern Los Angeles County. It was the primary link between two of the world's busiest harbors and the national rail network. Mostly displaced with the April 15, 2002 opening of the more direct Alameda Corridor, the Harbor Sub takes a far more circuitous route from origin to destination, owing to its growth in segments over the decades. The subdivision was built in this fashion beginning in the early 1880s to serve the ports and the various businesses that developed along it.
The C Line is a 19.3-mile (31.1 km) light rail line running between the Los Angeles neighborhood of Westchester and the city of Norwalk within Los Angeles County, California. It is one of six lines forming the Los Angeles Metro Rail system and opened on August 12, 1995. Along the route, the line also serves the cities of Downey, Hawthorne, and Lynwood, as well as several unincorporated communities in the South Los Angeles region including Athens, Del Aire, and Willowbrook. The fully grade-separated route runs mainly in the median strip of Interstate 105 for its latitude portion and in a mixture of viaducts, embankments, and an open trench for its western leg. A free shuttle bus to Los Angeles International Airport (LAX) is available at Aviation/LAX station.
The Regional Connector Transit Project constructed a 1.9-mile (3.1 km) light rail tunnel for the Los Angeles Metro Rail system in Downtown Los Angeles. It connected the A and E lines with the former L Line. The A and E lines previously both terminated at 7th Street/Metro Center station, coming from Long Beach and Santa Monica, respectively, while the L Line ran through Little Tokyo/Arts District to either Azusa or East Los Angeles. Now the A and E lines continue together through new stations at Grand Avenue Arts/Bunker Hill, Historic Broadway, and Little Tokyo/Arts District. From there, they diverge on the former L Line toward Azusa and East Los Angeles, respectively. The project provides a one-seat ride into the core of Downtown for passengers on those lines who previously needed to transfer, thus reducing or altogether eliminating many transfers of passengers traveling across the region via Downtown Los Angeles.
Redondo Beach station is an elevated light rail station on the K Line of the Los Angeles Metro Rail system. It is located over Marine Avenue in the city of Redondo Beach, California, after which the station is named. It opened with the commencement of Green Line service on August 12, 1995. The station has been served by the K Line since a restructuring in November 2024.
The K Line is a light rail line in Los Angeles County. It currently consists of two separate noncontiguous segments. The 5.9-mile (9.5 km) northern segment runs north–south between the Jefferson Park and Westchester neighborhoods of Los Angeles, California, passing through various South Los Angeles neighborhoods and the city of Inglewood. The southern segment runs north–south between the Westchester neighborhood of Los Angeles and the city of Redondo Beach. It is one of six lines in the Los Angeles Metro Rail system operated by the Los Angeles County Metropolitan Transportation Authority (Metro). The northern segment, the oldest segment of the line, opened on October 7, 2022, making it the system's newest line.
The D Line Subway Extension Project is a construction project in Los Angeles County, California, extending the rapid transit D Line of the Los Angeles Metro Rail system from its current terminus at Wilshire/Western in Koreatown, Los Angeles, to the Westside region. The project is being supervised by the Los Angeles County Metropolitan Transportation Authority (Metro). The subway has been given high priority by Metro in its long-range plans, and funding for the project was included in two county sales tax measures, Measure R and Measure M.
The Foothill Extension is a construction project extending the light rail A Line, a part of the Los Angeles Metro Rail system. The project begins at the former terminus of the former Gold Line at Sierra Madre Villa station in Pasadena and continues east through the "Foothill Cities" of Los Angeles County. The plan's first stage, "Phase 2A", extended the then-Gold Line to APU/Citrus College station in Azusa; it opened on March 5, 2016. The first part of "Phase 2B" will extend the now A Line a further four stations to Pomona–North station on the Metrolink San Bernardino Line in Pomona, broke ground in December 2017 and is planned for completion in early-January 2025. The second part of Phase 2B will further extend the line two stations to Montclair Transcenter in Montclair, located in San Bernardino County, is planned to break ground in spring 2025 and be completed in 2030.
The Sepulveda Transit Corridor is a two-phased planned transit corridor that aims to connect the Los Angeles Basin to the San Fernando Valley through Sepulveda Pass in Los Angeles, California, by supplementing the existing I-405 freeway through the pass. The corridor would partly parallel I-405, and proposed alternatives include heavy rail rapid transit or a monorail line connecting the G Line in the Valley to the D Line and E Line on the Westside, and the K Line near Los Angeles International Airport.
Medford/Tufts station is a light rail station on the Massachusetts Bay Transportation Authority (MBTA) Green Line located off Boston Avenue near College Avenue in Medford, Massachusetts, adjacent to Tufts University. The accessible station has a single island platform serving the two tracks of the Medford Branch. It opened on December 12, 2022, as part of the Green Line Extension (GLX), which added two northern branches to the Green Line, and is the northern terminus of the E branch.
East Somerville station is a light rail station on the Massachusetts Bay Transportation Authority (MBTA) Green Line located in southeastern Somerville, Massachusetts. The accessible station has a single island platform serving the two tracks of the Medford Branch. It opened on December 12, 2022, as part of the Green Line Extension (GLX), which added two northern branches to the Green Line, and is served by the E branch.
Union Square station is a light rail station on the Massachusetts Bay Transportation Authority (MBTA) Green Line located in the Union Square neighborhood of southeastern Somerville, Massachusetts. The accessible terminal station has a single island platform serving the two tracks of the Union Square Branch, which parallels the Fitchburg Line. It opened on March 21, 2022, as part of the Green Line Extension (GLX), which added two northern branches to the Green Line.
The Southeast Gateway Line is a planned light rail line, mostly following the Pacific Electric's historic West Santa Ana Branch, connecting Downtown Los Angeles to the city of Artesia, along with other cities in southeastern Los Angeles County.
The Eastside Transit Corridor is a light rail line extension that currently connects Downtown Los Angeles with East Los Angeles. However, the extension is planned to extend further southeast to connect with the Gateway Cities, continuing from a relocated Atlantic station southeast to a new Lambert station in Whittier.
The K Line Northern Extension, formerly known as the Crenshaw Northern Extension, is a project planning a Los Angeles Metro Rail light rail transit corridor extension connecting Expo/Crenshaw station to Hollywood/Highland station in Hollywood. The corridor is a fully underground, north-south route along mostly densely populated areas on the western side of the Los Angeles Basin; it would be operated as part of the K Line. The Los Angeles County Metropolitan Transportation Authority (Metro) is prioritizing the project along with pressure from the West Hollywood residents. Construction is slated to start in 2041 and begin service by 2047 unless means to accelerate the project are found.
The North Hollywood to Pasadena Transit Corridor is a proposed 18-mile (29 km) bus rapid transit line in the Los Angeles Metro Busway system in Los Angeles, California. It is planned to operate between Pasadena and the North Hollywood station in the San Fernando Valley, where it will connect with the B Line in the Los Angeles Metro Rail system and the G Line in the Los Angeles Metro Busway system. The project completed its scoping phase in 2019, was approved by the Metro board on April 28, 2022 and is estimated to be completed by 2027. It is part of Metro's Twenty-eight by '28 initiative.
The Vermont Transit Corridor is a proposed 12.5-mile (20.1 km) bus rapid transit line in the Metro Busway network in Los Angeles, California with plans to convert it to rapid transit in the future. It is planned to operate on a north-to-south route on Vermont Avenue between the B Line's Vermont/Sunset station and the C Line's Vermont/Athens station on the Los Angeles Metro Rail system. The project feasibility study was released in February 2019 with a proposed completion date of 2028 for BRT and after 2067 for rail. It is part of Metro's Twenty-eight by '28 initiative and is partially funded by Measure M. The route will have signal priority at traffic lights and will have a dedicated right of way. Metro reports the initial cost is $425 million.
The Redondo Beach Transit Center is a bus station in Redondo Beach, California. The station consists of one large island platform with 11 bus bays and a 320-space park and ride parking lot located next to the transit center. The transit center opened in early 2023, replacing a nearby bus terminal at the South Bay Galleria dating to 1987.
The Torrance Transit Center is a bus station in Torrance that serves as the city's transport hub. It opened on June 9, 2023. The station is planned to serve as the southern terminus of the Los Angeles Metro Rail K Line via a proposed extension.
C Line Extension to Torrance 
