Race to build driverless cars accelerates

Automakers — and aspiring automakers — are seeking permission to put more experimental self-driving cars on the road to speed their development.

The companies want Congress to expand a cap on how many cars can be deployed under waivers from safety regulators, according to testimony from the Alliance of Automobile Manufacturers at a Senate hearing Wednesday. See:  Automakers want to test more self-driving cars on the roads.

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