To keep it simple, I'm guessing we're only talking about numbered routes.
In any case, I don't know about the technical legalities of it, so I don't urinate out on the road unless it's
absolutely necessary, where I'm in pain and can no longer hold it, especially when you're at the point where you can feel some discomfort while you're sitting down driving and you know the minute you get out and stand up, it's going to hurt to walk. It also depends on what I've had, I think. When I took my drive to Bozeman back in January, which is about 8 hours and 38 minutes (570 miles)—16 hours and 48 minutes (1,140 miles) in total for the roundtrip—about an hour into the drive there and the drive back, I had to urinate, but I was able to hold it until I got to Bozeman and then again until I got back home. Obviously, I went when I stopped to eat at Subway in Bozeman, but I ended up having to go again for obvious reasons. I also took an extra strength five-hour energy drink for the drive there and then another one for the drive back.
Anyway, as for when I've had to get out and go out on the roads, the only ones I can recall are:
- US Route 97
- US Route 12
- Washington State Route 21
WA 21 is the most recent one, which was February 27, 2021, and the only reason I remember the date for that one is because it was after I got my first dashcam and had started taking regular drives. In this case, it ended up being a drive to Spokane, Washington, and I went that way because I was going over Sherman Pass for the first time. I had to really go, so I stopped along WA 21 as I was heading north to take care of it. Obviously, any time I've had to go, I've gone behind trees. Only time I didn't was one time when I was coming back from Republic, Washington, at night—this was quite a while before I got my first dashcam—and I was on Manilla Creek/Peter Dan Road in Ferry/Okanogan County, the road connecting WA 21 to WA 155. I was pretty well off the road, and it's not a very traveled road, especially not at night, though I still went behind my truck on the side not facing the road.
Like I said, though, I otherwise avoid doing it because I don't know about the technical legalities of it. I don't know if it would technically still count as indecent exposure if somebody were to walk by or come up to you while you were urinating, for example, since you're technically out in public. Yes, urinating by itself isn't sexual, but your sexual organ is still out. I guess it's kind of like that saying: "If a tree falls in a forest and no one is around to hear it, does it make a sound?"