They've already had hybrid shunters built since 2004 http://en.wikipedia.org/wiki/Railpower_GG20B http://en.wikipedia.org/wiki/Railpower_GG20B and you can see s

They've already had hybrid shunters built since 2004 http://en.wikipedia.org/wiki/Railpower_GG20B http://en.wikipedia.org/wiki/Railpower_GG20B and you can see some more that were scheduled to be in use in 2007 and 2009 http://en.wikipedia.org/wiki/Hybrid_locomotive http://en.wikipedia.org/wiki/Hybrid_locomotive