> maybe drive by wire car manufacturers could start adding a "oh crap" manual handle to physically disengage power and apply some type of physical friction brake
It depends on the manufacturer, but I think this is already the case with Tesla cars? The brake specifically isn't drive-by-wire, it's an electrically assisted hydraulic brake - so even if a malicious actor could get the car to not do the assist part anymore, you can still stop by pressing the pedal hard.
I feel like bollards and other form of separating roads from pedestrians are unviable on the large scale. I hope manufacturers start focusing more on sandboxing any internet-connected parts of their software and leaving the whole car-driving part inaccessible from any of that.
It depends on the manufacturer, but I think this is already the case with Tesla cars? The brake specifically isn't drive-by-wire, it's an electrically assisted hydraulic brake - so even if a malicious actor could get the car to not do the assist part anymore, you can still stop by pressing the pedal hard.
I feel like bollards and other form of separating roads from pedestrians are unviable on the large scale. I hope manufacturers start focusing more on sandboxing any internet-connected parts of their software and leaving the whole car-driving part inaccessible from any of that.