This is a complex question to answer. There are numerous and varied factors to consider as noted by the numerous & varied responses. Bottom line – it’s a very subjective issue, as noted by the numerous & varied responses.
We were in the same position as you a few years ago. We drove to the empty lot we had selected for our future retirement home. It was about 8 pm, rolled down the windows & listened for the turnpike. Immediately, it was too loud for us so we transferred the downpayment to a spec house about 1 mile away. We’ve been here now for 5 years. We still hear the turnpike albeit not 100% of the time but in the mornings (Mondays especially) & frequently at night, around 9:30 pm when we retire. Even with all windows closed, locked & the AC on, we can hear it. On Monday mornings, I sometimes awake to the sound of tires rolling at 5 am. We’re not pleased but we’re not moving again. Some of the factors we didn’t know or consider: 1) the open land between us & turnpike, 2) the pond outside our bedroom/lanai/kitchen windows, 3) the lack of trees & large bushes between us & turnpike, 4) how easily sound travels in colder (40 degree) weather. So it all depends on what you can live with and what you choose not to live with. Fences are worthless for sound absorbancy. Also, be aware of the quarry off 470, not just the occasional blasting but the rock grinding at night. Good luck
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