It is not illegal to drive barefoot in Indiana. State law does not prohibit driving without shoes, and Indiana—like most states in the U.S.—has no statute making barefoot driving a traffic offense. While there is no legal restriction, the practice is officially discouraged as unsafe by the state. Driving barefoot can reduce your control over the vehicle, as bare feet may slip on the pedals more easily than shoes with proper structure and grip.
If you are involved in an accident and an officer or insurer determines that driving barefoot contributed to the crash, it could potentially be used as evidence of negligent or reckless driving in a civil or criminal case, but being barefoot itself is not a ticketable or arrestable offense in Indiana.
You cannot be fined or arrested simply for driving barefoot in Indiana, but you are encouraged to choose footwear that helps you operate your vehicle safely.
Sources
[1] https://www.protectyourrights.com/legal-to-drive-barefoot-in-indiana/
[2] https://www.superlawyers.com/resources/traffic-violations/driving-barefoot-is-it-legal/
[3] https://www.findlaw.com/legalblogs/law-and-life/illegal-to-drive-barefoot/
[4] https://expresslegalfunding.com/is-illegal-drive-barefoot/
[5] https://www.palermolawgroup.com/blog/driving-without-shoes
