Use our semi-autonomous calculator to determine whether fully self-driving vehicles really can be the huge boost to earnings that General Motors, Tesla and others profess – or whether they’re the proverbial pot of gold at the end of a rainbow.

Hint: The business only really takes off when operators can profitably charge just 60 cents a mile – the average cost a car owner pays assuming she drives around 13,000 miles a year.

At present, the average price-per-mile for riding in a cab or in cars sent by Lyft, Uber and similar services is $3.25 in the five largest U.S. ridesharing cities, according to Cruise, General Motors’ autonomous-vehicles unit.

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