Union Pacific recently upgraded a large portion of its switch locomotive fleet to a new, ultra-low-emission engines. They started in California (of course) but have expanded the project throughout their entire network, encompassing 23 states.
The new locomotives have been tested by each state individually (most recently by Texas). The locomotives passed Texas' emissions standards, and then beat them by 50%. They produce 60% less NOx and particulate emissions and use up to 30% less fuel. Of course, that means 30% less greenhouse emissions as well.
Sometimes it feels like older technology isn't worth improving, but this is a significant leap in efficiency for a vehicle that has been basically unchanged for 50 years.
written by weee, December 13, 2007
written by socialscientist, December 19, 2007
written by Audi Driveshaft, January 01, 2008
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