Many locomotives from numerous rail companies have served along the Peninsula Commute rail line between San Francisco and San Jose since 1863.
 Agencies and companies that have managed service include Southern Pacific, San Francisco and San Jose Railroad, Caltrain, Caltrans, Amtrak (contracted operator from 1980 to 2012) and TransitAmerica Services (contracted operator from 2012- current).
The Port Washington Branch is an electrified two-track rail line and service owned and operated by the Long Island Rail Road in the U.S. state of New York.
 It branches north from the Main Line at Winfield Junction, just east of the Woodside station in the New York City borough of Queens, and runs roughly parallel to Northern Boulevard past Mets-Willets Point (Citi Field), Flushing, Murray Hill, Broadway, Auburndale, Bayside, Douglaston, Little Neck, and then crosses into Nassau County for stops in Great Neck, Manhasset, and Plandome before terminating at Port Washington.
The Green Line is a 20 mi light rail line running between Redondo Beach and Norwalk within Los Angeles County; it is one of six lines forming the Los Angeles County Metro Rail system.
 The line opened on August 12, 1995.
 It became the third line in the Metro Rail system after the opening of the Blue Line and Red Line.
 The line was delayed due to a change of the line's route from Los Angeles International Airport to El Segundo.
 In addition to Redondo Beach and Norwalk, the route also serves El Segundo, Hawthorne, South Los Angeles, Lynwood, Downey, and Willowbrook (in South Los Angeles).
 It serves the Plaza Mexico shopping center at the Long Beach Boulevard station in the city of Lynwood.
 A free shuttle bus to Los Angeles International Airport (LAX) is available at the line's Aviation/LAX Station.
 The line is mostly suburb-to-suburb service, so it is the only one in the entire Metro Rail system not to serve Downtown Los Angeles.
The Long Island Rail Road (reporting mark LI) , legally known as the Long Island Rail Road Company and often abbreviated as the LIRR, is a commuter rail system in the southeastern part of the U.S. state of New York, stretching from Manhattan to the eastern tip of Suffolk County on Long Island.
 With an average weekday ridership of 337,800 passengers in 2014, it is the busiest commuter railroad in North America.
 It is also one of the world's few commuter systems that runs 24 hours a day, 7 days a week, year-round.
 It is publicly owned by the Metropolitan Transportation Authority, which refers to it as MTA Long Island Rail Road.
The Enola Branch is a railroad segment of the Port Road Branch and it was a rail line; the Enola Branch railroad segment and the rest of the Port Road Branch is owned and operated by the Norfolk Southern Railway in the U.S. state of Pennsylvania.
 The railroad segment runs from Washington Boro northwest to Marysville and it is a former Pennsylvania Railroad rail line.
 Its south end is at a former junction with the Atglen and Susquehanna Branch, where the main segment of the Port Road Branch continues southeast.
 Its north end is at the Pittsburgh Line.
 Along the way, it meets the York Secondary at Wago Junction (near York Haven) and goes under the Lurgan Branch at Lemoyne.
 Norfolk Southern labels the Enola Branch as part of the Port Road Branch, officially ending the Enola Branch's existence as a rail line, the main segment of the Port Road Branch runs from Marysville, Pennsylvania south to Perryville, Maryland.
 The line goes through the Enola Yard.
METRORail is the 23.8 mi light rail system in Houston, Texas (USA).
 As of 2015, the METRORail has an average weekday ridership of 60,600 and total annual ridership of 16,500,400.
 After Dallas' DART Light Rail, METRORail ranks as the second most-traveled light rail system in the Southern United States and the 12th most-traveled light rail system in the United States.
 METRORail is operated by the Metropolitan Transit Authority of Harris County (METRO).
Great Neck is a station in the village of Great Neck Plaza, on the Port Washington Branch of the Long Island Rail Road.
 It is the first station on the branch (heading from Manhattan) in Nassau County.
 The station is at Middle Neck Road and Station Plaza at Great Neck Road, 0.25 mi north of Northern Boulevard, and is 15.9 mi from Penn Station in Midtown Manhattan.
 From this point on, the line becomes single track to Port Washington.
The Central Rail Line (Polish: "Centralna Magistrala Kolejowa" , "CMK", also known in Poland as the "Rail Line No. 4", Polish: "Linia kolejowa nr 4"), was completed on 23 December 1977 could have been the first high speed railway line in Europe.
 Designed for speeds of up to 250 km/h, the line goes from the city of Zawiercie in Zagłębie Dąbrowskie region of southern Poland, to Grodzisk Mazowiecki in the suburbs of Warsaw.
 Its length is 224 kilometers, and in the Polish rail system it is officially known as "Rail Line Number 4" ("Linia kolejowa numer 4").
 The line was originally built for rail freight transport, but it now carries InterCity and EuroCity long distance passenger services, mostly from Katowice and Kraków to Warsaw.
DART Light Rail is a light rail system in Dallas, Texas and its suburbs owned and operated by Dallas Area Rapid Transit.
 The system comprises 93 mi among its four lines — the Red Line , the Blue Line , the Green Line , and the Orange Line .
 It is the longest light rail system in the United States.
 As of the fourth quarter of 2014, the system has an average weekday ridership of 101,800, making it the largest light rail system in the Southern United States by ridership, and the seventh largest in the United States by ridership.
 As of Fiscal Year 2015, the system average weekday riderships had fallen to 97,800.
 (The system utilizes 163 light rail trains manufactured by Kinki Sharyo, with all trains being converted to "Super" LRVs which feature level boarding and higher passenger capacity.
Port Washington is the terminus of the Long Island Rail Road's Port Washington Branch in Port Washington, New York.
 The station is located on Main Street, between Haven Avenue and South Bayles Avenue, just West of Middle Neck Road, and is 19.9 miles (32 km) from Penn Station in Midtown Manhattan.
 Pedestrian bridges between the platforms are in line with Franklin Avenue and Bayview Avenue, both of which end Haven Avenue.

Question: What was the averge weekly ridership in 2014 of the commute rail system that includes the Port Washington Branch rail line?
Answer: 337,800