 The line extends from Trenton, Texas to Garland, Texas, then from Garland to Dallas via trackage rights over Kansas City Southern Railway and Union Pacific.DGNO also operates from Sherman to McKinney, from Carrollton to Murphy and from Dallas to Lake Dallas.Of the total trackage, approximately 51 miles are leased from Dallas Area Rapid Transit (DART), and DGNO leases 129 miles from Union Pacific.