First conceived in 1957, the concept of an "Outer Loop" freeway around the Dallas metropolitan area was introduced in 1964 by the Greater Dallas Planning Council's Regional Transportation Highway Plan.
Loop 9 is a proposed state highway facility that will be located on the southeastern fringes of the DFW Metroplex. The route is expected to pass through southern Cedar Hill, and intersect U.S. Highway 67. The project will also intersect with I-35E in Glenn Heights, I-45 in Ferris, and I-20, where it will connect to I-635 and southern Mesquite.
TxDOT began development of the schematic and Environmental Assessment for the section I-35E to I-45 in April of 2014. Loop 9 and the outer loop are part of a long-term plan of adapting to a growing, expanding DFW population, estimated to surpass 10 million by 2040.
More information can be found on the project's website.