Though this question has been rehashed sufficiently, I have a few suggestions.
When considering buying a house next to the road, you do want to spend some time on a patio if the patio is on the road side of the house. During the afternoon rush hour, you might find the noise fairly loud.
With lending loosening up, there are more buyers out there and a few are willing to look past road noise so they can move out of their rental.
Sellers are in the driver's seat these days. But that doesn't mean sellers can get too aggressive on price.
A home that has noise coming into the house can be upgraded with double or triple pane glass in windows. There is something called white noise that can eliminate some noise in the interim. But someone stretching to get into that home is not going to be able to afford an upgrade for a while. They have to be motivated. The seller has to show he is willing to negotiate. If the price isn't right to begin with, buyers will stay away in droves.
If you read other posts here, you'll see I'm not in the minority on this.