Which type of cargo is prohibited from being carried on a bus?

Carrying irritating materials or tear gas on a bus is strictly prohibited due to the potential safety hazards they pose to passengers and the driver. Such materials can cause severe discomfort, injury, or panic in enclosed spaces, where a sudden release could affect the entire busload of passengers. Regulations are in place to ensure the safety and comfort of all individuals aboard public transportation, and prohibiting dangerous substances helps to protect everyone from potential harm.

In contrast, food items and personal belongings are generally allowed as they do not pose an inherent threat to the safety and comfort of passengers. Construction materials are often managed under specific guidelines, but they are typically not classified with the same level of risk as irritating materials or tear gas, which are clearly dangerous and can result in severe health implications.