How about a trench to reduce railroad tracks crossing railroad tracks?
From:
[
www.portvanusa.com]
"The trench is a new east-west rail entrance that eliminates conflicts with north-south rail traffic by bringing trains under the 1908 Columbia River railroad bridge. The unique structure, which is watertight and sits atop more than 410 steel pilings embedded in the river’s north bank, is the cornerstone of the port’s $275 million West Vancouver Freight Access project."
Location:
[
www.google.com]
Bruce