Grand Parkway

State Highway 99 (SH 99, the Grand Parkway) is a proposed 180+ mile circumferential scenic highway traversing seven counties and encircling the Greater Houston region. The project has been shown on governmental planning documents since the early 1960's.

Active planning and design of the highway began in the early 1980's with the designation of SH99 from US59S near Sugar Land to US290 near Cypress in 1983 and the creation of the Grand Parkway Association and designation of the entire loop from SH146 in Galveston County near San Leon, around the south, west, north and east sides of metropolitan Houston to SH146 in Harris County near Baytown. The current existing and proposed route can be viewed in Google Maps by clicking this link.

The first portion constructed was a 19.5-mile from US59S near Sugar Land to north of IH10W near Katy. These portions of Segment D, US59S to IH10W, and Segment E, IH10W to US290, were open to traffic in August 1994.

The next segment constructed was Phase I of Segment I-2, from IH10E to FM1405 in Chambers County. This 8.8 mile section of the highway was opened to traffic on March 25, 2008 and is a toll facility operated by TxDOT. Please refer to TxTag Web Page for information regarding this segment. Phase 2 of Segment I-2, FM1405 to SH 146 near the east end of the Fred Hartman Bridge in Baytown, is currently under design.

TxDOT awarded contracts for Segments D and E, from south of IH10W, near Katy, to US290, near Cypress, in 2011. This project is scheduled to be open to traffic in December 2013.

TxDOT awarded a single Design-Build contract to Zachry Odebrecht Parkway Builders for Segments F-1, F-2 and G, from US290 to SH249 to IH45N to US59N, thru northern Harris and southern Montgomery Counties in 2013. This project is scheduled to be open to traffic in late 2015 and has an information website at

Other segments are in various stages of project development. For detailed segment information, please click on the segment's tab to the left.