When a plaintiff files a claim seeking compensation for personal injuries caused by a vehicle accident, negligence must be proven. Establishing negligence requires a plaintiff to show that someone owed them a duty, breached it, and that the plaintiff suffered an injury because of that breach.
In vehicle accident cases, it is understood that everyone using the roadways owes other drivers and passengers the duty of reasonable care. Specifically, all drivers have obligations to conform to driving norms, obey traffic signals, comply with traffic laws, and avoid reckless behavior that might put others at risk.  If a bus driver is violating the law or operating the vehicle in a way that is not adequately protective of other drivers or pedestrians, the driver could be negligent.