BTS Productshttps://doi.org/10.21949/15016682009PDFBriefYoung, PegNotis, KenUnited States. Department of Transportation. Bureau of Transportation StatisticsUnited States. Department of Transportation. Bureau of Transportation StatisticsUnited StatesFreight transportationEconomic factorsEconomic indicatorsTIFF-002The Bureau of Transportation Statistics' (BTS) freight Transportation Services Index (TSI) showed a decline a full year and a half prior to the start of the current recession. This downturn suggests the TSI may prove particularly useful as an indicator of economic downturns. Leading economic indicators identify and anticipate emerging turns in the current business cycle by historically turning downward before a recession or a slowdo...