Connecticut Department of Transportation in the context of "Mass transit"

The Metropolitan Transportation Authority (MTA) is a public benefit corporation in New York State responsible for public transportation in the New York City metropolitan area. The MTA is the largest public transit authority in North America, serving 12 counties in Downstate New York, along with two counties in southwestern Connecticut under contract to the Connecticut Department of Transportation, carrying over 11 million passengers on an average weekday systemwide, and over 850,000 vehicles on its seven toll bridges and two tunnels per weekday.

CT Rail, stylized as CTrail, is the brand for commuter rail services overseen by the Connecticut Department of Transportation (CTDOT), in the U.S. state of Connecticut, with services on the Hartford Line extending into Massachusetts. CTDOT oversees two lines: Shore Line East, between New Haven and New London, Connecticut, and the Hartford Line, from New Haven, through Hartford, to Springfield, Massachusetts.

Services are operated under contract, with Shore Line East operated by Amtrak along the Northeast Corridor, and the Hartford Line operated by a joint venture of TransitAmerica Services and Alternate Concepts. CT Rail trains, along with other CTDOT rail operations, use the reporting mark CNDX.

The Metro-North Commuter Railroad Company (reporting mark MNCW), also branded as MTA Metro-North Railroad and commonly called simply Metro-North, is a suburban commuter rail service operated by the Metropolitan Transportation Authority (MTA), a public authority of the U.S. state of New York. Metro-North serves the New York Metropolitan Area, running service between New York City and its northern suburbs in New York and Connecticut while also providing service within New Jersey. Areas served include Port Jervis, Spring Valley, Poughkeepsie, Yonkers, White Plains, and Wassaic in New York and Stamford, New Canaan, Danbury, Bridgeport, Waterbury, and New Haven in Connecticut. Service in Connecticut is operated under contract for the Connecticut Department of Transportation; conversely, service on lines west of the Hudson River is operated under contract by NJ Transit. Metro-North also provides local rail service within the New York City boroughs of Manhattan and the Bronx.

Metro-North is the descendant of commuter rail services dating back as early as 1832. By 1969, they had all been acquired by Penn Central. The MTA acquired the Harlem, Hudson, and New Haven Lines by 1972, but Penn Central continued to operate them under contract. Service was transferred to Conrail in 1976, when it absorbed most of Penn Central's railroad functions after Penn Central's bankruptcy. The system took its current form in 1983, when the MTA took over direct operation of Conrail's commuter services in the northern portion of the Tri-State Area and formed Metro-North to run them.

The New Haven Line is a 72.7 mi (117.0 km) commuter rail line operated by the Metro-North Railroad in the U.S. states of New York and Connecticut. Running from New Haven, Connecticut, to New York City, the New Haven Line joins the Harlem Line in Mount Vernon, New York, and continues south to Grand Central Terminal in Manhattan. The New Haven Line carried 32.07 million passengers in 2024. The busiest intermediate station is Stamford, with 8.4 million passengers, or 21% of the line's ridership.

The line was originally part of the New York, New Haven and Hartford Railroad, forming the southern leg of the New Haven's main line. It is colored red on Metro-North timetables and system maps, and stations on the line have red trim. The red color-coding is a nod to the red paint used in the New Haven's paint scheme for much of the last decade of its history. The section from Grand Central to the New York–Connecticut border is owned by Metro-North and the section from the state line to New Haven is owned by the Connecticut Department of Transportation (CTDOT). From west to east in Connecticut, three branches split off: the New Canaan Branch, Danbury Branch, and Waterbury Branch, all owned by CTDOT.