What can trigger a violation related to littering?

Disposing waste on a highway constitutes a clear violation related to littering, as it directly involves the unlawful disposal of trash or waste materials in a public area. This action not only contributes to environmental degradation but also poses hazards to public health and safety. Littering laws are designed to keep public spaces clean and free of debris, with specific emphasis on areas like highways where such waste can have serious consequences on traffic safety and ecological balance.

In contrast, the other options do not relate to the act of littering. Having a flat tire is a vehicle maintenance issue and does not involve the disposal of waste. Parking incorrectly addresses the proper use of parking facilities rather than waste disposal. Failing to indicate a lane change involves adherence to traffic signaling laws, which also does not pertain to littering. Thus, disposing of waste on a highway is the only choice that aligns with the definition of littering violations.