What type of substances are not allowed on the bus?

Flammable liquids or gases are prohibited on buses due to safety concerns. The primary reason for this restriction is to protect the safety of all passengers and the bus operator. Flammable substances can pose a significant risk as they are capable of catching fire and potentially causing an explosion, especially in the confined space of a bus. This regulation is enforced to ensure a safe environment for everyone on board.

In contrast, while there may be certain restrictions on the quantity or type of food and drinks allowed, personal belongings and electronic devices are generally permitted as long as they do not obstruct the bus's operations or the safety of passengers. These items are considered normal carry-ons for individuals traveling on public transportation.