Grand Parkway set to be widened from four lanes to six north of Katy

Grand Parkway between Cinco Ranch and Interstate 10.



See how big the Grand Parkway is compared to other formations in the gallery ahead. Grand Parkway between Cinco Ranch and Interstate 10.



See how big the Grand Parkway is compared to other formations in the gallery ahead. Photo: Karen Warren, Houston Chronicle Photo: Karen Warren, Houston Chronicle Image 1 of / 45 Caption Close Grand Parkway set to be widened from four lanes to six north of Katy 1 / 45 Back to Gallery

Motorists in Katy may see more construction before the Grand Parkway offers better traffic flow.

The Texas Department of Transportation will expand a 6.6-mile mile stretch of Texas 99 between Interstate 10 and FM 1093 from four lanes to six lanes. A start date for the project has not been set yet.

MORE EAST TEXAS HIGHWAY NEWS: Grand Parkway to get wider before new sections are finished

According to the department's website, after that is completed, the next phase of the project would include widening the four lanes to six from Kingsland Boulevard to the Fort Bend County line.

Widening the roads is expected to cost $8.7 million.

Grand Parkway is a $1.1 billion roadway that stretches from US 290 to US 59 North of Houston.

The loop is so large that it could surround the entire state of Rhode Island.

To see how truly big Grand Parkway is, scroll through the gallery above to see it's size compared to other formations.

Will Axford is a digital reporter for Chron.com. Read more of his stories here and follow him on Twitter.