texas99The Grand Parkway (SH 99) is a 180-mile hhway, composed of 11 segments traversing seven counties. The Grand Parkway is intended to improve mobility, reduce congestionState Hhway 99. FM 1093 to I -10: Main Lanes, Frontage Roads and Noise Barrier Update. PROJECTNEWS. May 2025. Quick Facts. Project Location. Harris and Fort Bend Counties