I don't live in Dayton but my wife's family does and I have cycled the area quite a bit. Ohio in general seems to be more trail oriented than what I am used to. It seems that the traffic engineers have deliberately tried to keep cyclists off the roadways and drivers often seem mystified as to what they should do when they encounter a cyclist in the street. With that being said, I haven't had any extraordinarily bad experiences in Dayton and I wouldn't hesitate to commute there. It may just take a little time to get used to the local customs.