Is it normal to have a fear of buses?

For a while now I've had a fear of buses. I remember in school on field trips I would always hate being on the bus to get to the destination and back to the school out of fear of the bus crashing or tipping over. I always knew it was unlikely to happen since they are designed to not tip over but I always got really anxious turning a corner or going uphill/downhill, and I would have to grab onto my seat or the seat in front of me because there were no seat belts and I didn't feel safe. I was even more worried in winter because of all the ice on the roads.