The Collin County Commissioners Court amended two interlocal agreements with the city of Frisco on Dec. 15 to make Rockhill Parkway a six-lane road.

The amended agreements increase the project budget for the road, which will border two planned developments at the Dallas North Tollway and US 380 intersection to the south.

The court approved increasing funds from $6.6 million to nearly $7 million for the first project, which will construct a new roadway from Dallas Parkway to Preston Road. This portion of the road will run next to a planned 120-acre mixed-use development by Donald Godwin, a Dallas attorney and real estate investor.

Frisco will also build an overpass for the portion of Rockhill Parkway that will intersect railroad tracks east of Dallas Parkway, County Judge Keith Self said.

The cost for the second project, which will widen the roadway to six lanes from CR 26 to Dallas Parkway, was increased from $1.4 million to $3.4 million. Another planned mixed-use development covering 320 acres sits next to this portion of the road.

The whole project stretches about 1.5 miles.