Hello!
We live right next to a train line and my boyfriend is thinks we have to move because the noise will startle our baby (EDA very far away). I hate the trains, which run from about 5am till 1am, but I have a feeling they won't be an issue for a baby. We've had kids stay a couple of times and they haven't had any issue. But of course I don't want to be stuck in a house that makes the new baby / no sleep situation worse than it has to be, and I do have a habit of assuming I know what's best without having any actual basis for my opinion! 
Any thoughts very much appreciated!