TxDOT projects have long been users of intelliRock and concrete maturity technology. Hi-5 in Dallas is an excellent example (case study).
The Texas Pavement Design Guide states: "The maturity method, Tex-426-A, Estimating Concrete Strength by the Maturity Method, may be used to open the pavement to traffic at an earlier age than seven days with either Class P or Class HES concrete."
Tex-426-A is an excellent place for DOTs to start when considering a state maturity specification and is available online. The calibration curve adjustment provision when verifying the strength-maturity relationship is of particular interest. Contact Engius for more example specifications.