https://www.wired.com/2016/05/las-new-metro-line-wont-reduce-traffic-thats-ok/
http://thesource.metro.net/2016/05/13/need-some-expo-line-extension-pics-here-they-are/
http://thesource.metro.net/2015/05/08/photos-signal-testing-in-west-l-a-for-expo-line-2/
http://thesource.metro.net/2017/01/04/1-6-billion-in-federal-funding-secured-for-purple-line-extensions-second-phase/
http://sitescan.net/portfolio/metro-expo-line-expansion-phase-2/
http://thesource.metro.net/2014/09/23/metro-staff-seeks-approval-to-secure-federal-funding-for-phase-2-of-purple-line-extension-subway/
http://www.lamag.com/driver/mark-your-calendars-all-the-metro-rail-openings/
https://en.wikipedia.org/wiki/Los_Angeles_Metro_Rail#Lines
http://www.railwayage.com/index.php/passenger/light-rail/la-expo-line-phase-2-slated-for-start-up.html
https://en.wikipedia.org/wiki/7th_Street/Metro_Center_station
https://en.wikipedia.org/wiki/Regional_Connector
https://en.wikipedia.org/wiki/Los_Angeles_Metro_Rail_rolling_stock#Rail_vehicles
https://en.wikipedia.org/wiki/Breda_A650