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A method updates a target driving policy for an autonomous vehicle at a target location. The method includes the steps of obtaining, by the vehicle, vehicle driving data at the target location; transmitting, by the vehicle, the obtained vehicle driving data and a current target driving policy for the target location to a data center; performing, by the data center, traffic simulations for the target location using the vehicle driving data to obtain an updated target driving policy; and transmitting, by the data center, the updated target driving policy to the vehicle.