Minimum of 20-25, maximum of 70-75.
My hope is that within half a century years we'll look back at an age in which virtually ever adult was not only permitted to drive, but expected to do so as a matter of daily routine, with a mix of horror and bewilderment.
Fun fact: Perhaps you don't know this from your urban liberal elitist bubble, but not everyone lives in a city or within walking distance of a public transit area. If you expect all these people to bike wherever they go you should be placed in an asylum.
