A greener locomotive will make its official California debut in Sacramento Wednesday. The California Department of Transportation (Caltrans) will present the locomotive during a press conference at the Sacramento Valley Rail Station, which holds a prestigious spot in railroad history as the western starting point for the Transcontinental Railroad. Caltrans and Amtrak are partners operating "Amtrak California." Caltrans owns this locomotive, plus 16 others and 88 train cars. Amtrak operates the trains and stations. The first in the Amtrak California passenger fleet, the locomotive has been upgraded to operate using the cleanest diesel technology available for train engines. “This is r