State Route 397 (Mack Hatcher Parkway) Extension

Williamson County


The planned Northwest Extension of State Route 397 (Mack C. Hatcher Memorial Parkway) is a new alignment that will continue the existing parkway on the northwest side of the City of Franklin in Williamson County. The roadway will extend the existing four-lane, divided parkway approximately 3.1 miles, from south of SR 96 (west of Franklin) to east of Hillsboro Road (north of Franklin).

Purpose and Need

Mack Hatcher Parkway is a primary transportation concern for the City of Franklin. The Northwest Extension is part of a larger effort to create a complete loop* around the city.

The planned extension will improve access and connectivity to the existing transportation network, while also increasing capacity for current and future traffic volumes and promoting social and economic development in the area.


The Northwest Extension creates a new segment of SR 397 that will extend from south of SR 96 to east of Hillsboro Road. The roadway will ultimately be a four-lane, median-divided facility, consistent with the existing parkway.

Due to the significant cost of construction, the Northwest Extension project has been divided into two smaller sections or phases.

  • Phase I Interim Improvement will include the construction of a two-lane roadway, all side road improvements, a multi-use path, and a single bridge crossing of the Harpeth River.
  • Phase II Ultimate Improvement will complete the four-lane divided facility, including a second bridge crossing of the Harpeth River.

Access points will be located at Hillsboro Road, Del Rio Pike, SR 96, and Old Charlotte Pike.

The project includes curb and gutter, traffic signals, and a multi-use path.

*The Southwest Extension, from SR 6/US 31/Columbia Pike to SR 96, is NOT currently referenced in the Nashville Area MPO’s 2040 Regional Transportation Plan and is NOT currently programmed to be constructed by TDOT or the city of Franklin at this time.

The video above highlights construction progress on the Northwest Extension
of State Route 397 (Mack C. Hatcher Memorial Parkway) as of May 2020.