As someone who grew up next to a highway in a place with constantly-on TVs, i don't notice most kinds of noise, so i can't offer any advice on that front.

What was a distraction in my case was internet browsing. This got solved by having a dedicated tablet for all sorts of non-essential browsing, and the work computers never having anything but work-related links.

You'd think that's not going to matter, but the little bit of friction that created was enough.