Plain-English definition of a freight market index, ratio, or charge from the FreightFA glossary: OTRI, OTVI, load-to-truck ratio, NTI, Cass Freight Index, RCAF, fuel surcharge, freight class, detention and demurrage, DIM weight, bill of lading, deadhead, accessorials, linehaul, and more. Returns who publishes it, how to read it, and why it matters. Does not count toward the allowance.