The regulations specific to commercial trucks can also serve as evidence of negligence. One of the most common examples is a violation of the so-called “hours of service” rules. These rules limit the number of hours a truck operator can be on the road without taking a break. Violating these rules could increase the likelihood of an accident. There are also federal regulations regarding the weight of a truck or the length of a trailer. The failure to comply with any of these regulations could have a direct impact on the cause of an accident.