[0] https://www.theverge.com/2019/7/1/20676854/electric-cars-art...
I too enjoy cycling and understand that there are serious safety problems involved with cars and bikes sharing the road and that and most of our cities have done a poor job of dealing with them. I don't think keeping around legacy noise pollution is the answer. It reminds me of this: https://xkcd.com/1172/
Like? (Don't limit yourself to the easy-to-introduce-today; not everywhere has established road infrastructure, and your ideas could be used there.)
We have to stop treating noise as a mere annoyance or as something that "Karens" bitch about because of their priviledge.
It's polution, a health issue, something that ruins quality of life, and for people with certain health issues can be a chronic problem. It prevents people from sleeping, focusing, lowers productivity, make people "dumber", you name it.
In a lot of ways, the impact of noise can be similar to that of lead pipes. And we act like we can just tell people to deal with it, and that white noise machines and earplugs (hello ear infections!) are a solution (spoiler. I use both and it barely makes a dent in the noise sometimes).
Increasingly, modern car drivers are enclosed in noise dampened, environmentally controlled environments with some sort of sound entertainment playing (music, podcast, talkback radio). So car drivers are less able to make good use of sound and other cues for detecting other traffic.
The lack of sound from hybrid cars, for example the Toyota Prius when accelerating in electric mode, has caught me by surprise while cycling. Not knowing you are about to be overtaken can be dangerous because there is an instinctive fight/flight response which can cause a sudden flinch or overreaction away from the surprise and you naturally turn your head to look at the perceived danger. As you are normally cycling on the edge of the roadway there is a higher potential to now accidentally ride over/into an obstruction (drainage grate, kerb, pothole) and come off your bike.