Self driving cars cannot come soon enough. Cars are too big, too heavy, and thus too dangerous for the average person to drive in such a crowded area such as city streets.
I can't wait until the day when no one owns their own car. There is no need. For most people they only are actually using their car at most 2 hours of every day. The rest of the time it sits in your garage or a parking lot.
It will be like a taxi that picks you up almost instantly and drops you off at the door of where you need to go. Need to keep your things in it for a time period then let it know that and it won't go pick someone else up and wait nearby for you.
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