This is a thing I also see on my commute.
At one time, of course, there were farms all along the long streets east of Portland and going through the area we once commonly (thought inaccurately) called East County, interrupted only by Gresham and Troutdale and Fairview, which were just small burgs at that time.
Eastern Multnomah County ... small-town Oregon. Now, of course, it's a totally different planet.
There are at least a couple of working farms still surviving. One I've visited to take a bunch of Wy'east pictures, as anyone who's followed this knows, Rossi Farms, on NE 122nd and Shaver, between Fremont and Sandy, adjacent to Parkrose High. This is a corner of a similar working farm: Fujii Farms, a farm mostly specializing in berries.
This is the northwest corner of SE Stark and S Troutdale Road, and this is where Fujii Farms has a seasonal fruit and produce stand operating from approximately June through the summer. They have more than one.
The fields behind that stand are predominantly berries but there are also grapes. There have been school buses and porta-commodes during the summer; echoes of my going out and picking strawberries out around Silverton when I was a kid are ringing most strongly.
For those of you who like this sort of thing, they have the fresh produce and berries coming.