I was thinking about the same thing a few months ago, so I wrote a blog post, which then turned into a little calculator.<p><a href="http:&#x2F;&#x2F;martin.drashkov.com&#x2F;2015&#x2F;09&#x2F;how-cheap-can-autonomous-cars-get.html" rel="nofollow">http:&#x2F;&#x2F;martin.drashkov.com&#x2F;2015&#x2F;09&#x2F;how-cheap-can-autonomous-...</a><p>Paying 15-20 cents per kilometre to ride in an autonomous taxi seems achievable. This means that public transit could become slightly cheaper and self-sustaining. At this rate, it also means people will likely be travelling a lot more, so maybe the price will go up again because of congestion charges.