Fast Green Trains  

Cleantechnica has a post on a fast train service in Sweden with a range of energy efficiency features - Sweden Rolling Out 183 MPH High-Speed Green Train.

The Green Train, or Gröna Tåget, will cut energy use on rail lines by 30 percent through lowered operational costs and journey times. Top speeds reached 183 MPH on a test run.

Best of all, the Green Train can operate on the current rail infrastructure. That means there’s no need to lay down new tracks.

Energy saving measures on the train include a permanent magnet motor to increase propulsion chain efficiency and a system that saves up to 15 percent of traction energy by assisting drivers with speed and traction force information.