Of course they are making a big deal out of this

 Drum up the phony publicity

TriMet tests clearances for MAX Orange Line, pulls train over Tilikum Crossing (video) | OregonLive.com

Construction manager Gary Hopkins said it will be the first time a MAX train will cross Portland's newest bridge.
The train was pulled by a diesel truck that is equipped to travel at a walking pace.
"It all looks good on paper," Hopkins said, "but the clearances are all pretty tight."
The clearance test is expected to last all day.