When we're doing the 5 drive we don't have time to get off the Interstates... we've been forced to go around Portlandia a few times, but other than taking the 99 from the Grapevine to Sacramento the rest is all on the 5. It's bad enough to have to detour on the 99E and 205 from Salem to Vancouver on account of the mess in Portland (*). IMHO, they ought to build express lanes from Salem to Kalama, WA. No exists.... perhaps only one in Vancouver and another 30 miles south of Woodburn.
In the late 70s and throughout the 80s Oregon drivers were better than Washingtonians... but in the last 20 years the crop of drivers from Eugene to Portland are the worse I've encountered anywhere.... sure they got bad drivers in Seattle, but nowhere do I see entitled, slow, drivers with zero situational awareness as in the run from Eugene to Woodburn on the 5. Must be all the students... I don't know, but they are bad, bad, bad, slow, drivers...
Washingtonians are a lot faster.
To give you an over all idea. It's 1200 miles from Orange Cty, SoCal to the Puget Sound. In the three seasons we do it in a non stop 16-17 hour trip. Trying to time Oregon in light traffic... I will usually top off the tank at Weed, CA or Kalama, WA and drive at 75 mph through Oregon (**) on CC. If I'm lucky. In the winter we stop off at Weed, CA for the night. The drive from SoCal to Weed is ~670 miles which can be done in quick time, assuming we don't get hosed on traffic in SoCal or a big booboo on the 99. The drive from Weed to the Puget sound is only 540 miles but it takes longer than the southern leg of the trip because OR is so slow.
We used to stop at Casey's in Roseburg for lunch/dinner but no more, we just want to get through it ASAP... mind you from South of Eugene to the Siskiyou it's fine, if a bit slow, but the flow is good. It's just that by the time we got there, south, we're beat and tired from the Portlandia experience.. and on the way North we're steeling ourselves for the mess ahead.
Two years ago we drove through Portland at 3:30AM. It was fine, except for the idiot driving a loaded gravel truck trying to do 80 mph on the 5 across the bridges... he was F'ing nuts!
The only good thing about that run is that our car, a Honda, has a good sounding system and it will generate an ersatz surround field from stereo. I got 500GB of storage in my cell phone and 500+ Tidal HiRez (and some Redbook) downloads, so we can do all of Oregon on one band.... I recommend the Grateful Dead.
(*) I don't think those people have built a new freeway in 25, 30 years!!!
(**) By way of comparison... we cruise at 85 mph in California and 79 in WA.