[dmckeon]

We could ease into more driver testing by requiring retesting after certain types of incidents - vehicle goes off roadway for no apparent reason, collision in a manner suggesting impairment - but that might rely too much on the discretion of a responding law enforcement officer. Perhaps better to let insurance companies do a carrot/stick approach: discounts for periodic driver retraining/testings, required retesting after an older driver is at-fault in a claim. Disclaimer: am older driver by TFA standards.