People say they do get used to noise. When we bought our first house, we were amazed that houses alongside the East Coast Mainline had to have their floors strengthened, but were and still are popular. One DD used to live near the Newcastle Metro line and hardly noticed it. DD2 now lives under the flightpath for Newcastle airport - it’s been so quiet during Lockdown, she’s going to have to get used to it again, but it doesn’t bother her, although I’m stupidly excited to see planes flying so low! I’m on a main road with a 50mph limit - it’s noisier on certain days at certain times, but I’ve a water feature which ‘deadens’ some of the noise. I’d be more concerned with how the lay by is used. Might lorries park up or caravans stay overnight? Groups of cars meeting for fast food and leaving litter? A similar area I know of has had CCTV installed to try to catch fly tippers.
However, if the house ticks all the boxes?? Early days though, if you’ve just started viewing.