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. It is still necessary to complete the specified curing. A maturity curve may be developed during the mix design process to establish the relationship between the concrete maturity and concrete strength. This may be used to identify what the maturity of the concrete should be when the opening strength has been reached. This maturity value may be used to estimate the in situ strength and open pavement to traffic that has completed the required curing. A maturity test should not be used in lieu of job control strength testing to determine the conformance of the mix to the mix design.