The city of Monterrey, Mexico, will have its subway system, called Metrorrey, propelled with electricity obtained from biogas. Simeprode, the company that manages the city waste system, is finishing a 5.3 MW power plant that will produce electricity for the two subway lines. This plant will allow Monterrey not only to run its mass transit system with bioenergy but also to expand the subway networks in the near future. The remaining power will be used for public lightning. The technology was imported from Germany, and the total cost of the project was about $6.5 million.
[Source: El Porvenir via Energias Renovables