I've seen those in Oregon as well. I've heard that you're good as long as you don't walk past the sign but I would imagine it's one of those things where enforcement depends on the individual cop that stops you and whether they've had their donut for the day.
oregon is legal to hitchhike on just about any highway/freeway, i've done it all my life, you just gotta stay behind the white shoulder line. washington though, i've always heard of people getting fucked with for hitching in washington...
I've never seen a straight up pictoral sign like that but I've seen a lot of freeway entrances with signs prohibiting pedestrians (and often any other non-motorized method of travel). My understanding is that you'll be fine as long as you don't walk past the sign, but I've never actually tested that out, so your mileage will vary.
I rode past an anti-hitchhiking sign today in eastern Oregon. It said something along the lines of "beware of noxious weeds, don't pick up hitchhikers". I wanted to get a picture, but my phone was buried in my panniers, and I didn't feel like stopping to dig it out.
The first $50 in donations go towards paying our monthly server fees and adding new features to the website. Once this goal is reached, we'll see about feeding Matt that burrito.
Buy Matt a Beer
$75.00 of $75.00
Now that we have the bills paid for this month, let's give Matt a hearty thank you by buying him a drink for all the hard work he's done for StP. Hopefully his will help keep him from going insane after a long day of squishing website bugs.
Feed Matt a Burrito
$90.00 of $100.00
Now that the bills are paid and Matt has a beer in his hand, how about showing him your love by rewarding all his hard work with a big fat burrito to put in his mouth. This will keep him alive while programming new features for the website.
Finance the Shopping Cart
$90.00 of $200.00
Now that the bills are paid and Matt is fed, perhaps it's time to start planning for those twilight years under the bridge... if only he had that golden shopping cart all the oogles are bragging about these days.