State Transportation Statistics 2015. The U.S. Department of Transportation’s Bureau of Transportation Statistics (BTS) today released the 2015 State Transportation Statistics (STS), a reference guide to transportation data for the 50 states and the District of Columbia. STS 2015 includes a wide range of state-by-state information. The 13th annual STS consists of 116 tables of state data on infrastructure, safety, freight transportation, passenger travel, registered vehicles and vehicle-miles traveled, economy and finance, and energy and environment. Contact: Dave Smallen: (202) 366-5568, David.Smallen@dot.gov.