Concerning railroad safety, and, in connection therewith, limiting the maximum length of a train operating in the state, requiring certain railroads to use wayside detector systems, limiting the amount of time a train may obstruct public travel at certain crossings, authorizing a crew member’s designated union representative to investigate certain reported incidents, authorizing the public utilities commission to impose fines for certain violations, requiring fine revenue to be paid to the front range passenger rail district for the purposes of maintaining and improving the safety of a front range passenger rail system, and requiring certain railroads to carry insurance coverage in minimum amounts.