The Federal Highway Administration (FHWA), Texas Department of Transportation (TxDOT), and the Lone Star Rail District (LSRD) are studying the proposed transportation project to construct and operate a regional passenger rail service system along the IH–35 corridor connecting the greater Austin and San Antonio metropolitan areas.The Federal Highway Administration (FHWA), Texas Department of Transportation (TxDOT), and the Lone Star Rail District (LSRD) are studying the proposed transportation project to construct and operate a regional passenger rail service system along the IH–35 corridor connecting the greater Austin and San Antonio metropolitan areas.