You can hear traffic noise from the bridge from the Bay front homes as the sound carries very well across the water. By the time the sound hits the trees, it is muffled enough that you won't hear it across the street. Like most other noises, you quickly adjust and get use to it, and never even know it's there.
If you are looking at buying, just realize that the 331 bridge will likely be rebuilt and expanded into 4 lanes at some point in the future, and how that might affect that neighborhood, is unknown. They may do a fly-over like the new Hathaway Bridge connecting PC to PCB, and that may elevate the noise projection, making it less, or it may be closer to the neighborhood, making the noise easier to hear. Again, humans quickly adjust to routine noises, and are able to block them out. There is a little town in eastern TN, where the train comes through twice every night about midnight and 4am. Scared the ba-geezers out of me when the whistles blew, both times. I asked locals how they were able to sleep and they said that they never wake up, sleeping right through the loud whistle blowing and echoing through the valley.
