Well, at least in an area with a lot of Amish, car drivers get trained to expect a cart. ;~D
When I was young, I rode all over town.... through town. Most people are good, and the horses are more capable than we think. But now, I'd be a little nervous to cross our street or ride down it any distance. I'd like to get over that, particularly if it takes us awhile to get a trailer, because there might be a few trails to explore just a little ways down the road. I worry about big semi trucks with the Jake brakes. The cars I worry about less, most people slow way down.
When we were going to church here in Bixby, I use to ride my horse sometimes to there. It was about 7 miles. There was only one place where there wasn't much room to ride by the road.
One time, luckily I was on Rocky, a car load of boys went flying past yelling, and beating on the side of the car, right at that narrow spot. Rocky didn't care, but it pissed me off bad. I heard them coming from behind me and as they went by I leaned down and flipped them off, and hollered something not nice:). Guess that was really bad since I was on my way to church. Of course, they thought that was funny.
I generally don't have trouble when I ride on the roads, but you never know is the problem. I also worry about the horse slipping if you have to get on the asphalt like to cross a brige or cross a road.
Becky