You’re technically correct, there is no law prohibiting a current or former president from driving, but there is a policy preventing it and it is enforced by the secret service (who follow them around for the rest of their life). Many former presidents have gone on the record that the lose of their driving privileges really sucks (Bush 43, Clinton, and Obama have all discussed it on camera during various interviews). It’s been a policy since Kennedy was assassinated, lots of other policy changes too, but one was the no driving bit.
You’re technically correct, there is no law prohibiting a current or former president from driving, but there is a policy preventing it and it is enforced by the secret service (who follow them around for the rest of their life). Many former presidents have gone on the record that the lose of their driving privileges really sucks (Bush 43, Clinton, and Obama have all discussed it on camera during various interviews). It’s been a policy since Kennedy was assassinated, lots of other policy changes too, but one was the no driving bit.
Random sources: https://www.smh.com.au/world/us-presidents-can-have-everything--except-the-car-keys-20140506-zr5we.html
https://www.cnbc.com/2017/06/28/presidents-arent-allowed-to-drive.html
And one just about some times they drove anyway:
https://www.motorbiscuit.com/3-u-s-presidents-got-around-no-driving-rule/