October 26, 2015, 8am PDT
You will be forgiven for thinking you are looking at an East Coast commuter rail line: It's electrified with level boarding, mostly 15-minute headways, with bike and luggage racks, operating 22 hours a day from Denver's Union Station to the airport.
October 6, 2014, 11am PDT
Alstom Transport uses technology similar to that of hydrogen fuel cell automobiles. Railway Gazette reports that German rail authorities hope to develop Zero Emission Trains by purchasing fuel cell trainsets.
August 20, 2010, 5am PDT
More capacity for the same cost is the case with double-decker commuter cars -- if they can fit into tunnels, that is. Bi-level train were once more common in the commuter trains serving NYC. However, these cars can have their own disadvantages.
The New York Times - N.Y/Region
May 30, 2010, 11am PDT
The Federal Railroad Administration does not allow for the mixing of train types for safety reasons, which proved a key obstacle for Caltrain's plan for electrification. As a pilot project,they are allowing the line to utilize electric multiple units
Mercury News via Palo Alto Daily News