Metrolink's Riverside Line is a commuter rail line running from Los Angeles Union Station in Downtown Los Angeles to Riverside along the Union Pacific Railroad. It runs weekday peak commuter hours only, with very little midday and reverse commute service. In 2011, the average weekday ridership was 5,161 passengers. History The Riverside Line, the fourth line to be introduced, was added to the Metrolink system in June 1993. This line featured Saturday service from June 2000 until January 2002, when it was cancelled due to low ridership. As of November 2021, the line has seven trains daily on weekdays only with reverse commute service eliminated in 2019. The Riverside Line can be used to get to Ontario International Airport; the East Ontario station has an airport shuttle served by Omnitrans Bus route 81 as of 2019, including discounted Lyft fares from the station. As Metrolink trains along the Riverside Line share tracks with Union Pacific freight trains, delays of up to 90 minutes are not uncommon. In April 2005, morning westbound trains arrived on schedule 90% of the time, while those headed east during the evening arrived on schedule only 72% of the time. Present Decline Ridership for the Riverside line has gradually declined following the opening of the 91/Perris Valley Line in 2002. Much of the decline in service has been a direct result of competition with the 91 Line or San Bernardino Line, or track right-of-way disputes with Union Pacific. Planning of the line's route has also come into question later in its lifetime, as the line was not redirected to the north half of the Monte Vista Subdivision to possibly construct a station to directly serve Ontario International Airport, which was heavily renovated in 1998. As a result, many riders believe Metrolink has not made the line as much of a priority for frequent usage, which has shown in the decline of trains per day in recent schedule updates. As of 2022, the Riverside Line operates seven trains on weekdays only. Stations Demographics In 2011, the average weekday ridership was 5,161 passengers, with 46 percent male and 54 percent female. Eighty-nine percent of riders used the line for work commutes. The median household income for riders was . Ridership by ethnicity was evenly split: 27% Hispanic 27% Caucasian 21% Asian/Pacific Islander 19% African American 5% other Accidents Several accidents have occurred on the Riverside Line since its