1438 is pretty far back, before the Renaissance. I seriously doubt carts or coaches were "common", as in every commoner owning one. I'm sure they were around, for carrying goods, doing construction, etc., but this is more like how, today, we have dump trucks and utility vehicles, but the number of dump trucks per citizen is very small. It's just not like today's car-based societies (esp. the US) where every person expects to own a car and use it for getting around.