Metro Los Angeles’s MACE Pilot Project

Metro Los Angeles’s MACE (Mass Airflow Collection Equipment) pilot project placed a wind turbine into the Red Line subway tunnel (between North Hollywood and Universal City) to collect energy generated by wind from passing Red Line trains. Metro’s future is looking pretty green.

For more information about Metro, visit there website,

How MACE Works:

  • Fan blades begin spinning as the train leaves North Hollywood (the displaced air is strong).
  • The blades can exceed 1,070 revolutions per mintue (RPM).
  • The blades will continue to spin for up to 2 minutes after the train passes.
  • The MACE is estimated to generate more than 28,000 kilowatt hours (kWh) per year.
  • It should create enough to power about 12 homes in California for a year.
  • The electricity can be used to power electric vehicle charging stations, station and tunnel lights, escalators, and more.
  • The MACE can safely and effectively collect clean, renewable energy for Metro.

Check out the video below to see MACE in action.

MACE & Metro Red Line
MACE & Metro Red Line

MACE Pilot Project

About Metro’s Red Line
The Red Line is a heavy rail subway line running between Downtown Los Angeles via the districts of Hollywood and Mid-Wilshire to North Hollywood within Los Angeles where it connects with the Metroliner Orange line (bus rapid transit) service for stations to the Warner Center in Woodland Hills and Chatsworth. It is operated by the Los Angeles County Metropolitan Transportation Authority (Metro).

The Red Line, which is one of six lines forming the Metro Rail rapid transit system opened in stages between 1993 and 2000. Together with the Purple Line, these two heavy rail lines combine to form L.A. Metro Rail’s busiest line. As of October 2013, the combined Red and Purple lines averaged 169,478 boardings per weekday.

The route currently known as the Red Line was originally intended to continue beyond its eastern terminus at Union Station to East Los Angeles. At the north end of the route, the Red Line was to turn west from North Hollywood station toward Warner Center. However, a 1998 proposition was passed by voters, which banned use of county sales tax revenue for subway construction due to the high cost of construction and problems associated tunneling under Hollywood Blvd.

The tunneling ban put an end to expansion of the Red Line for the foreseeable future. The route to Warner Center was turned into the Metro Orange Line, a bus transitway (BRT) service. However, in recent years, new legislation has been passed reflecting new public support for subway development, and Metro is now working on two subway projects (the Westside Subway Extension and the Regional Connector) in other parts of the county. – Wikipedia

Travelivery Southern California by Jeremy Womack

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