Which of the following is not considered a traffic offense?

The answer is correct because failure to wear a seatbelt is classified as a secondary offense in many jurisdictions, including Indiana. This means that law enforcement can only cite a driver or passenger for this violation if they are stopped for another primary offense, such as speeding or reckless driving. In contrast, the other options listed—reckless driving, parking in a disabled space without a permit, and leaving a vehicle running unattended—are considered primary traffic offenses and can be cited independently. Recognizing the distinction between primary and secondary offenses is important in understanding traffic laws and the enforcement practices that accompany them.