Pennsylvania Motor Truck Association and four trucking company members are suing two commonwealth agencies over the automatic adoption of California heavy-truck emission standards, contending only their legislators can create state laws. PMTA President Rebecca Oyler said, “The trucking industry and PMTA members in Pennsylvania have no control over — or even input into — these regulations because they’re from California. The cost increases our members are facing will make it difficult for them to upgrade to new, cleaner trucks.”