On Monday, 10-01-12, an Amtrak train traveling from Oakland to Bakersfield was struck and derailed by a tractor-trailer truck at a grade crossing near Hanford, CA. There are several news articles on the web, few of which are listed here. Click on the headline to see the article.
At least 20 injured in California train crash
Amtrak: Crossing gate down in Calif. train crash
Big-rig trucker can't explain Amtrak crash
A couple of hours later, another tractor-trailer and train collision occured near Hanford, CA. This accident involved a freight train and was apparently on a different set of tracks. Following is a link to an article about this second crash.
Second truck collides with freight train