You might be uncomfortable mixing with other people in an enclosed space, or worried about how other passengers might behave. Many people who get anxious on public transport have a similar underlying concern, which is that they won't be able to get off when they need to, for instance if they feel panicky or sick.
Agoraphobia is a fear of being in situations where escape might be difficult or that help wouldn't be available if things go wrong. Many people assume agoraphobia is simply a fear of open spaces, but it's actually a more complex condition. Someone with agoraphobia may be scared of: travelling on public transport.
Your peripheral vision will register the movement and create a contradiction in the brain. That's where the bus sickness begins. There are cases when people experience the dreadful symptoms of motion sickness only while reading while in a moving vehicle.
Pediophobia is a fear of dolls or inanimate objects that look real, and pedophobia is a fear of actual children. People can suffer from both phobias, so someone who fears children (pedophobia) may also fear the childlike features of dolls (pediophobia), and someone with pediophobia may also have pedophobia.