Greg beat me to it; I was going to point out Schenley Park in Pittsburgh. City owned course in Oakland (and bordering Carnegie Mellon, my alma mater).
There are multiple road crossing, a few a in a gulley, and you have to hit a bad shot to hit the road.
The most interesting / egregious may be hole 2. First shot parallels the road, the road is right of the fairway. But for the approach, you have to cross the road at about a 45 degree angle. They have a chain link fence in line with the fairway so you have to elevate the ball over the road, and presumably traffic, during the approach, rather than skulling it through a car window.
Im sure because it's a city owned course and the city wanted to limit their own liability, there are (or at least when I was there) signs clearly indicating that it was drive (your car) at your own risk through the area.