These things will slow traffic in and around major cities to even more of a crawl. And that is assuming they operate as intended. Think what a couple of hackers could do with thousands of these on the streets:
http://www.telegraph.co.uk/technolo...l-public-roads-arrive-in-the-Netherlands.html
http://www.telegraph.co.uk/technolo...l-public-roads-arrive-in-the-Netherlands.html