Editing Greater Los Angeles (section)

===Los Angeles County Metro===
{{Main|Los Angeles County Metropolitan Transportation Authority}}
[[File:Los Angeles Metro System Map.png|thumb|right|Map of [[Los Angeles County Metropolitan Transportation Authority|LA County Metro]]]]
The [[Los Angeles Metro Rail]] is the mass transit rail system of Los Angeles County. It is run by the [[Los Angeles County Metropolitan Transportation Authority]] and its system runs six rail lines throughout Los Angeles County. Metro Rail currently operates four [[light rail]] and two [[rapid transit]] lines, altogether totaling {{convert|115.5|mi|km}} of rail, 101 stations, and over 360,000 daily weekday boardings {{as of|2012|12|lc=on}}.<ref>{{cite web|url=http://www.metro.net/news/facts-glance/#P110_1342|title=Facts at a Glance|publisher=[[Los Angeles County Metropolitan Transportation Authority|LACMTA]]|date=January 15, 2013|access-date=January 20, 2013|archive-date=August 20, 2019|archive-url=https://web.archive.org/web/20190820202535/https://www.metro.net/news/facts-glance/#P110_1342|url-status=dead}}</ref>
* The [[A Line (Los Angeles Metro)|A Line]] – light rail
* The [[B Line (Los Angeles Metro)|B Line]] – rapid transit
* The [[C Line (Los Angeles Metro)|C Line]] – light rail
* The [[D Line (Los Angeles Metro)|D Line]] – rapid transit
* The [[E Line (Los Angeles Metro)|E Line]] – light rail
* The [[G Line (Los Angeles Metro)|G Line]] – bus rapid transit
* The [[J Line (Los Angeles Metro)|J Line]] – bus rapid transit
* The [[K Line (Los Angeles Metro)|K Line]] – light rail

The system's light rail lines are the [[List of United States Light Rail systems by ridership|second busiest LRT system in the United States]], after Boston, by number of riders, with 200,300 average weekday boardings during the third quarter of 2012.<ref>Los Angeles County Metropolitan Transit Authority, [http://www.metro.net/news/facts-glance/#P110_1342 Facts at a Glance] {{Webarchive|url=https://web.archive.org/web/20190820202535/https://www.metro.net/news/facts-glance/#P110_1342 |date=August 20, 2019 }}, January 15, 2013.</ref> By 2019, it had become the most heavily ridden light rail system in the country.<ref name="APTA-2019-Q4">{{cite web | url = https://www.apta.com/wp-content/uploads/2019-Q4-Ridership-APTA.pdf | title = Transit Ridership Report Fourth Quarter 2018 | publisher = [[American Public Transportation Association]] | date = February 27, 2020 | access-date = 2020-04-04 | archive-date = January 12, 2022 | archive-url = https://web.archive.org/web/20220112122550/https://www.apta.com/wp-content/uploads/2019-Q4-Ridership-APTA.pdf | url-status = live }}</ref>

Since the region of the city is in close proximity to a major fault area the tunnels were built to resist earthquakes of up to magnitude 7.5. Both subway lines use an electrified third rail to provide power to the trains, rendering these lines unusable on the other three. The Blue and Gold Lines run mostly at grade, with some street-running, elevated, and underground stretches in the more densely populated areas of Los Angeles. The Green Line is entirely grade separated, running in the median of I-105 and then turning southward along an elevated route.

The rail lines run regularly from roughly 4:00 AM to 1:00 AM, seven days a week.[https://cdn.beta.metro.net/wp-content/uploads/2025/04/22184833/801_TT_12-15-24_v2-2.pdf]