General Motors may (NYSE:GM) be looking to blockchain for sharing information associated with autonomous vehicles.

A patent application published Thursday by the U.S. Patent and Trademark Office detailed a process by which self-driving cars would be able to store all their data on a distributed ledger. The document, produced by GM Global Technology Operations LLC, further notes that any data stored could be easily shared among the blockchain’s users.

The company cited navigation as one use case for the blockchain system, explaining:

“It is desirable to provide locations information and densities of vehicles in regions in an online blockchain ledger for interoperable information sharing between vehicles of participants for use in navigating routes.”

Sharing data between different independent platforms is also proposed in the filing. A blockchain exchange for municipalities, local authorities and public facilities such as airports could, it says, determine the “validity of permits and licenses to operate as hacks, taxis, or other for-hire services.” Further, if a vehicle is ticketed, that information could be shared with a blockchain run by the relevant authority.

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