Something travelling "over a trestle" would probably refer to a train.
I walked across the old wooden trestle to get to the other side of the river. The train rumbled over the steel trestle, with the water rushing below. The hikers stopped to admire the breathtaking view from the trestle.
That would be a "trestle"
Wildcat creek trestle is an abandoned steel railroad trestle over Wildcat Creek on the former Monon Railroad near Owasco, Indiana http://bridgehunter.com/in/carroll/wildcat-rr/
the trestle has a pink butterfly on it.
Wilburton Trestle was created in 1904.
Rosendale trestle was created in 1872.
Kinsol Trestle was created in 1920.
A Trestle is a hard frame used as a support. "The trestle at the end of the bridge collapsed, now the bridge is shut down."
they started making trestle masks in 1994.
Fabyan Trestle Bridge was created in 1908.
Robin Road Trestle was created in 1936.
Parry Sound CPR Trestle was created in 1907.