[desertsolitaire]

Is I-5 in that area a busy roadway? Not familiar with Oregon roads or traffic.

[Steve Van Doorn]

It's the primary freeway for the area
https://www.google.com/maps/search/I-5+Oregon/@44.0494331,-123.0857729,12.96z?entry=ttu

This is a political statement by the police to the citizens. It has very little to do with the actual protesters.
"We're here to help criminals against the citizens. Get used to it"