Under the direction of Dallas officials, the North Texas Tollway Authority (NTTA), and the Texas Department of Transportation (Tx DOT), the tollway is being constructed on the side of the Trinity closest to downtown.
It will accommodate four lanes of traffic, with some sections possibly increased to six lanes; the parkway is set to cost approximately $1.8 billion.
The Margaret Hunt Hill Bridge, the largest portion of the Trinity project started thus far, is currently complete and open to traffic connecting Spur 366 to Singleton Blvd.
Completed at a cost of $120 million, it opened March 2012.
The Margaret Mc Dermott Bridge, the second signature bridge, will replace the existing Interstate 30 bridge over the Trinity River.