I'm not riding in that area, so I can't vouch for it myself... But this is what I got in my inbox today.
I got your email passed on to me for response from Ask ODOT. Thanks for writing and for sharing your concern about conditions on Hall Boulevard. I looked into this and got similar information as you. The maintenance crews swept the section of Hall Boulevard from OR 99W down to Durham Road on Sept. 14 and Sept. 19. Additionally, the maintenance section manager said he looked at that section of road a couple days ago and that it was in good shape. He also did mention the striping is wearing out and there are small glass beads left behind. These are not a hazard to bike tires, but could potentially appear that way.
I'm told that they will continue to sweep Hall Boulevard on a regular rotation and keep an eye on the conditions. Feel free to contact me if you have further questions or concerns.
ODOT Community Affairs