The Cass Truckload Linehaul Index is an accurate, timely indicator of market fluctuations in per-mile truckload pricing. The index isolates the linehaul component of full truckload costs from other components (e.g. fuel and accessorials), providing an accurate reflection of trends in baseline truckload prices. Data within this unique index is derived from actual freight invoices paid on behalf of Cass' clients, which totaled over $22 billion in 2012. The index uses January 2005 as its base month.