Abstract Methods and systems for maintaining a distributed ledger and/or blockchain of transactions and/or events pertaining to autonomous vehicles and/or smart contracts. An enforcement server may receive indications of transactions and/or events generated by one or more autonomous vehicles. The transactions and/or events may include information relating to a trigger condition and/or a decision condition associated with one or more smart contracts. The enforcement server may route the transaction to the appropriate smart contract to determine whether a trigger condition has been satisfied. When a trigger condition is satisfied, the enforcement server may automatically perform an action to enforce the smart contract and/or update the distributed ledger. In some aspects, the distributed ledger may record events associated with autonomous and semi-autonomous vehicle technology or system usage, including events associated with transitioning between manual and autonomous control, or vice versa, of one or more autonomous or semi-autonomous vehicles.
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