Amazon.com: Classic Train Building Bridge City Passenger Express Train Tracks Toys Accessories Railroad Construction Building Block Compatible with Major Brand (Train Bridge) : Toys & Games
Arch / bridge / tunnel for Lego train by Choumarin | Download free STL model | Printables.com
Building a Train Bridge :: Miek Gieben
LEGO Railway Bridge | David Boddy | Flickr
Train Viaduct Module (free instructions) from BrickLink Studio