Interesting. Everyone is so interested in environmental noise. The noise on a record might be 60 dB down if you are lucky. Now , if your turntable is not isolated you can take that environmental noise at say 80 dB down and amplify it with your turntable so it is 40 dB down. Clever. So, if you are really worried about it get a decent isolated turntable or buy yourself a MinusK platform.
Mike all that stuff is great but it will not save you from the trucks driving down the street. It does sound like your place is out of the way. I Live on a cul-de-sac 1/2 mile from a main street. On my other side is an 18 hole golf course. So, for a house not to far from society I'm pretty quiet. But, noise is never a problem for me. Maybe I listen louder than most but for whatever reason noise is never an issue. Fortunately our brains can only pay attention to the loudest noise. If the noise is over 30dB down you will never hear it.