How far away is the train? I used to live where I heard trains during the night. It didnt take long though, and we got used to them, I just never heard them. Guests would complain they couldnt sleep because of the trains. My kids grew up with them, and it never kept them awake either. 28 years later we moved from there, to the state I am in now, and the first 6 months we lived here, neither hubby nor I could sleep because, there was no train sound. There are very few trains in the area I live in, and when I go somewhere, that there is a train sound, I actually get excited to hear it. The point of all this is, that you do get used to it, in a short period of time.

What do the walls, windows, and attic/roof framing and insulation consist of?

Ugh. I hate using earplugs! And I have to wheneverwe travel because of my husband’s snoring. At home we have separate rooms.

Thanks so much for all the advise .. yes I figured that sound proofing the room can be really expensive!! So the next best thing is white noise :) there are lot of options & possibilities are enormous.. from sound of rain to ocean waves etc ., now I have my sleep back .. ear plugs are also great option :)

Earplugs work better for me, but YMMV. White (or pink) noise is certainly an option. There are many ways to get it. You can buy dedicated electronic gadgets that generate masking noise; they come in all kinds of price ranges.. You can tune an old FM radio between stations and turn up the volume. You can run a fan all night (but that uses more electricity than the above options). You can download white or other masking noise from the web (I see pages and pages of websites when I search for "white noise mp3") and put it on your phone to play at night. There are probably others I haven't thought of too. Good luck!