TRB has released the latest issue of the Intercity Rail Passenger Systems Update. The online newsletter is published intermittently and is designed to disseminate information about current research and developments in intercity rail passenger systems. Articles in this issue explore the growth of the European passenger rail systems, recent developments in the high-speed rail movement in the United States, and the potential role of energy-efficient trains in reducing greenhouse gas emissions. This issue also includes an update on Amtrak.