SH 99 Grand Parkway

Segments H, I-1 & I-2

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Construction Commenced

Completion Date

Miles of New Highway

First Segment (D) of

SH-99 opened


Reconstructed Bridges


Parcels Acquired


The vision for mobility using a “highway loop” around Houston dates back to the early 1960s. 


More than 50 years later, this vision is becoming a reality with the design and construction of the remaining segments of SH 99 Grand Parkway, Segments H, I-1 & I-2. At 180+ miles, this circumferential scenic highway will be the longest highway loop in the United States, traversing seven counties and encircling the Greater Houston region, which is the fourth-most populous city in the United States.

In March 2017, the Texas Department of Transportation awarded the $855 million design-build construction contract for Segments H, I-1 & I-2 to Grand Parkway Infrastructure, a joint venture led by global infrastructure leader Ferrovial Agroman, along with Webber LLC and Granite Construction Inc.

Construction along the corridor, stretching from the US 59/IH 69 interchange to the north and SH 146 in Baytown to the south, commenced in 2018. Construction activities are currently underway, including bridge construction, roadway paving, right-of-way acquisition with property owners, and utility relocations.

Fast Facts:


  • Segments H, I-1 & I-2 represent 52.8 miles of the 184 mile SH 99/Grand Parkway loop

  • Acquisition of easements through 375+ land parcels

  • 80 new or substantially reconstructed bridges will be built

  • The first segment – Segment D – of SH 99/Grand Parkway opened in August 1994; the most recent segment – Segment G – opened in March 2016

Project Maps

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Traffic Impacts

As construction continues, we will post information about upcoming traffic impacts, including lane, ramp, and bridge closures. Please note that all traffic impacts are subject to change. 


February 22 - 27 (7PM - 7AM)

Left lane closure on SH 99 eastbound and westbound near Fisher Road


February 22 - 27 (7PM - 7AM)

Left lane closure on SH 99 northbound and southbound near IH 10

February 23 (8PM - 5AM)

The intersection of Business 146 and SH 99 will be closed to through traffic. Motorists traveling westbound on SH 99 will be detoured via Business 146 northbound. Motorists traveling eastbound on Business 146 will not be impacted. Business 146 south travelers will be detoured to Alexander Street.

February 24 (8PM - 5AM)

The intersection of Business 146 and SH 99 will be closed to through traffic. Motorists traveling westbound on SH 99 will not be impacted. Motorists traveling eastbound on Business 146 will be detoured at Evergreen Road. Local business will maintain access.

Ongoing (24hrs)

U-turn closed at SH 99 westbound at Business 146 eastbound

Ongoing (24hrs)

The eastbound and westbound SH 99 U-turns closed at FM 1405

Ongoing (24hrs)

U-turn closed at SH 99 eastbound between FM 1405 and Fisher Road

Ongoing (24hrs)

Wismer Drive (between Business 146 eastbound and westbound) closed


February 22 - 27 (8AM - 5PM)

Flagging operation on FM 1960 near CR 610

February 22 - 27 (8AM - 5PM)

US 90 eastbound and westbound reduced by one lane near CR 491

February 22 - 27 (6AM - 7PM)

Flagging operation on CR 603

February 22 - 27 (7AM - 5PM)

Flagging operation on FM 686 between CR 621 and CR 622


Ongoing (24hrs)

CR 610 closed at FM 1960

Mont Belvieu

February 22 - 27 (24 hrs)

Single right lane closure on 146 southbound and northbound near Eagle Drive

February 22 - 27 (9AM - 4PM)

Flagging operations on FM 565 near City Hall

New Caney

February 22 - 27 (7AM-7PM)

Right turn lane on Loop 494 southbound closed

February 22 - 27 (8AM-5PM)

Flagging operation on westbound frontage road between Forest Drive and Dorston Drive.

February 22 - 27 (7AM-5PM)

Flagging operation on Ada Lane, Willaby Road, and Wilderness Road

February 22 (8PM - 5AM)

FM 1485 (both directions) will be closed from Forest Drive to Galaxy Blvd. Motorists in the area will be detoured via Forest Drive.

Upcoming (24hrs)

Dorston Drive will be closed to through traffic. Area residents will need to utilize the detour at Wilderness Road. This closure will take place for several weeks.

Ongoing (24hrs)

The eastbound and westbound SH 99 U-turns closed at Valley Ranch Parkway




For any inquiries, questions or concerns, please call 877-553-7374, email or fill out the form below.

Contact Us

Grand Parkway Infrastructure Office

8811 F.M. 1960 Bypass Road West

4th Floor
Humble, TX 77338

Tel: 877-553-7374

Hours of Operation: 8:00AM - 6:00PM  (Monday thru Friday)  

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Here at GPI, we're always looking for great people with great skills. For information on what jobs are available, please view our current listings. If you have any questions related to employment opportunities please email us at  or call 832-412-4633.


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