Texas State Highway 99

State Highway 99
Grand Parkway
Opened section of SH 99, highlighted in red.
Route information
Maintained by TxDOT and FBCTRA
Length	176.6 mi (284.2 km)
Existed	August 1994–present
Major junctions
CCW end	I-69 / US 59 / FM 2759 in Sugar Land
Major intersections	I-10 / US 90 in Katy US 290 / SH 6 in Cypress SH 249 / Tomball Tollway in Tomball I-45 in Spring I-69 / US 59 in New Caney US 90 near Dayton I-10 near Mont Belvieu
CW end	SH 146 in Baytown
Location
Country	United States
State	Texas
Counties	Fort Bend, Harris, Montgomery, Liberty, Chambers
Highway system
Highways in Texas Interstate US State Toll Loops Spurs FM/RM Park Rec
← SH 98 → SH 100

State Highway 99 (SH 99), also known as the Grand Parkway, is a beltway in the U.S. state of Texas. Its first section opened on August 31, 1994. When the route is completed, it will be the longest beltway in the U.S., the world's seventh-longest ring road, and the third (outer) loop of the Houston–The Woodlands–Sugar Land metropolitan area, with Interstate 610 being the first (inner) loop and Beltway 8 (Sam Houston Tollway) being the second (middle) loop. The proposed 176.6-mile (284.2 km) loop has been divided into 11 separate segments for construction and funding purposes.^[1] In May 2019, the Texas Department of Transportation gave the Grand Parkway a secondary designation as the Mayor Bob Lanier Memorial Parkway, honoring Bob Lanier, who served as the mayor of Houston from 1992 to 1998 and who had spearheaded the creation of the Grand Parkway.^[2]