GRAPEVINE (WBAP/KLIF)- The Texas Department of Transportation (TxDOT) and NorthGate Constructors celebrate the completion of the I-635/SH 121 Interchange Project north of DFW Airport. This $370 million project widened SH 121 to accommodate a new interchange and new direct connectors for FM 2499 and SH 26 to reduce congestion and improve safety in the area.…… MORE