Enacts GS 136-199, prohibiting railroads operating in the state on any main line, as defined, or any other line, a train that exceeds 8,500 feet in length. Defines train to mean one or more locomotives coupled with or without cars requiring an air brake test as specified in federal law. Makes violations a Class 1 misdemeanor with a fine between $250 to $1,000 for the first offense, between $1,000 and $5,000 for a second offense committed within three years of the first offense, and between $5,000 and $10,000 for the third and subsequent offenses committed within a three-year period. Excludes railroads operating only tourist, scenic, or historic excursions. Effective October 1, 2021.