Chisholm Trail Parkway Section 6 extends SH 121 from FM 1187 to US 67 for a total of 13.1 miles. It is a two-lane tollway with passing lanes.
Transtec performed Continuously Reinforced Concrete Pavement Designs for the tollway main lanes and ramps and asphalt pavement designs for cross roads and backage roads. NTTA requirements included the use of the Pavement ME software for design of CRCP. Transtec evaluated various base support systems and provided the most cost-effective high-performing solution with a design life of 50 years.