Some personal injury cases rely on proving negligence, while others involve negligence per se. In negligence per se cases, your legal team doesn’t have to prove the at-fault party failed to meet the reasonable person standard because the at-fault person broke the law. For example, traffic lights direct drivers to stop to prevent traffic collisions and injuries. When a person runs a red light, they’re breaking the law. If the person who ran the red light hits another vehicle and injures that vehicle’s driver, your legal team can argue negligence per se.