[kmlben65]

you can soundproof your sleeping room, just need to dampen frequencies that offer direction cues, they are above 1khz. electronics, car sound whooshing, rattling all produce those frequencies. if it's hard to dampen enough - dampen as much as you find economically viable and raise noise floor by running ventilation or big diameter fan, it will mask the rest of them.

also having fresh air ventilation (with soundproofed intake - they use quiet fan) is much more comfortable than having windows opened on busy street.