Oregon has a legal classification of "Vulnerable Road Users".
https://oregon.public.law/statutes/ors_801.608
Pedestrians, Horseback riders, Cyclists, Tractors, Skateboards, Highway Workers, etc.
Ok, so that seems to be a definition without a lot of additional legal discussion of the whole group of users. Yet, I think they treat different users differently. There is a Vulnerable user of a public way note with respect to careless driving and injuries or deaths.
https://oregon.public.law/statutes/ors_811.135
Now, the Oregon laws do specifically discuss passing bicycles.
https://oregon.public.law/statutes/ors_811.065
It is somewhat complex. But one should pass:
The driver of a motor vehicle may only pass a person operating a bicycle by driving to the left of the bicycle at a safe distance and returning to the lane of travel once the motor vehicle is safely clear of the overtaken bicycle. For the purposes of this paragraph, a “safe distance” means a distance that is sufficient to prevent contact with the person operating the bicycle if the person were to fall into the driver’s lane of traffic.
At a speed not greater than 35 miles per hour (I think when passing in a shared lane).
It is unique to bicycles, but some of the same issues come up with construction workers, police officers, flaggers, first responders, etc.