Is there very much traffic during rush hour in Haviland?

There is definitely some, but I can't say it's a ton. Route 9G cuts through Haviland and I know it relatively well, having taken it for a little while on my commute home from my previous job. It never really gets that bad, but odds are you will be far from the only car on the road heading your way. There are a few traffic lights which also slow things down, but in retrospect, I can't say it ever really took me that long to make my way through this hamlet.