SAN FRANCISCO (AP) — Adding fuel to rumors that Apple is working on designs for a car, local officials say engineers for the company recently made inquiries about a former navy base that's been converted into a testing ground for self-driving cars and other cutting-edge vehicles. An official with the Contra Costa Transportation Authority says Apple hasn't said what kind of testing it hopes to conduct at the decommissioned base in Concord, east of San Francisco. The agency is promoting the base and its 20 miles of closed roads as an ideal test facility for new automotive technology. Apple declined comment Friday.

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