High deck buses are automatically at a greater risk of serious injuries to passengers because they have a high center of gravity and can tip over when making turns or curves at elevated speeds. These vehicles have a greater chance of causing serious and often fatal accidents. It is too easy for the drivers of high-deck buses to lose control of these vehicles.
These are often caused by drivers who are fatigued from driving long distances. There are other risk factors to having a serious high-deck bus accident. These factors include drivers and passengers not wearing a seat belt. There can be drunk driving, reckless driving with the majority of accidents occurring between 12 am and dawn. Exchange ramps on freeways are particularly dangerous because of the curve involved and the speeds involved.