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.

On the west side of Houston, the Grand Parkway is open from US59S (Sugar Land) to I-10W (Katy) to US290 (Cypress). On the east side of Houston, the Grand Parkway is open from I-10E (Mont Belvieu) south to FM1405 (Baytown). Portions of the Grand Parkway are toll facilities and you must have an electronic tag, Harris County EzTag, TxTAG or NTTA TollTag, to use the road.

Other segments are under construction, from US290 (Cypress) to SH249 (Tomball) to I-45N (Spring) to US59N (New Caney) - these are set for opening in late 2015. Specific dates will be announced as we get closer to opening.

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 Grand Parkway Association does not build the road, operate the road nor collect tolls. Information for this is available as follows:

Fort Bend County operates the portion of the Grand Parkway Segment D from US59S to north of the Westpark toll road. For information on this or to discuss toll collection issues their website is or call 855-999-2024.

TxDOT, through their toll operations division, TxTAG, operates the portions of the Grand Parkway Segments D and E on the west from south of I-10W to US290 and on the east side from I-10E to FM1405. For information on this or to discuss toll collection issues their website is or call 888-468-9824.

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 or call 855-994-7263.

Fort Bend County is building a short portion of Segment C from US59S south to Rabbs Bayou. This project is scheduled to be let in late 2015. More information to come.

TxDOT is planning to award a design-build contract for Segments H & I-1 and I-2B from US59N to US90 to I-10E to SH146 thru Montgomery, Harris, Liberty, Chambers and back into Harris County. This contract is scheduled to be awarded in December 2015, construction will begin in 2016 and the project open to traffic in 2020. More information to come.

For detailed segment information, please click on the segment's tab to the left.

Please click the icon below to access the corresponding agency’s website