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This Autonomous Snow Blower Shovels on its Own, Recharges Itself, and Keeps Going
(www.carsandhorsepower.com)
This is a most excellent place for technology news and articles.
There are not really any similarities to the environment and use case of autonomous cars driving in open public roads, at high speeds, in a several thousand pound heavy vehicle, with thousands of other people acting in random unpredictable ways, and a 50 pound snow blower driving at walking pace in your own private closed driveway with basically no one in the area of operation.