is also a low speed inner city road

I don't have an exact way to measure but the road is almost as large as some highways where I live (France, not USA).

Yes any driver that hits it is at fault, but everybody would be safer if the road was designed thinner so cars would naturally slow down, having the bike lane behind the parked cars not in front to reduce the odds of being doored etc...

If the infrastructure treats people like they're robots that will perfectly respect speed limits because there is a sign, it will not work and just be dangerous. The infrastructure should be designed so that the most natural speed and the intuitive path is the right one.

FYI: I have a driving license, but I don't own a car and bike almost everywhere. I really don't like car, I also don't like infrastructure making cars more dangerous than they need to be.