1. A method comprising: by program instructions on a computing device, receiving data detailing operation of a plurality of at least partially manually operated automobiles; determining one or more trends in the operation of the plurality of at least partially manually operated automobiles, based at least in part on the data detailing the operation of the plurality of manually operated vehicles; generating one or more operational rules that are valid for a first geographic area, based, at least in part, on the one or more trends; and transmitting the one or more operational rules to one or more at least semi-autonomous vehicles.