HARRISBURG, Pa. (AP) — Spurred on by train derailments, some states crisscrossed by busy freight railroads aren’t waiting for federal action to improve safety. Instead, they’re pursuing their own remedies amid questions about whether states even have that authority. The Feb. 3 derailment along the Ohio-Pennsylvania border of a train carrying toxic chemicals has prompted new legislation and revived long-stalled efforts as backers voice skepticism that the federal government can help. Legislatures in at least a dozen states have advanced measures in recent weeks. Some of the new requirements include provisions long resisted by the railroad industry. It says it’s capable of making improvements and that its growing efficiency is not compromising safety.