When the Hemus motorway Sofia - Varna is finally completed which I guess will happen one day! The following villages if it takes the proposed route may be subject to continual traffic rumble so if anyone is looking here please take note.
From the Sofia end:-
Beglezh
Nikolaevo (Pl)
Aleksandrovo (south)
Chavdartsi
Krushana
Daskot
Paskalevets
Sushitsa
Gorski Senevets
Nikolaevo (VT)
Kamen
Popovo (north)
Makariopolsko
Panayot Volovo
I think these may be the worst affected, depends on the lay of the land how the noise travels of course.
Hope it helps.