Originally Posted by thekurgan
It's not a residential street, it's a boulevard, just in an old area. Speed limit is 40.
Regardless, if you need to fold your mirrors to not scrape, you should probably drive slower. The speed limit shouldn't be 40 if it wasn't safe to drive 40 mph without losing your mirrors. You can report that the speed is unsafe to the city so they can lower it if it is the case.
I've parked in spaces where I need to fold the mirrors or else the car won't fit. But in those situations, I would not move more than 5mph and usually have my head out the window so I make sure I clear. Most parking spots and garages built in the early 1900s like here in San Francisco are not designed to accomodate the huge cars we have now.