🧪California Test Methods
California Test Methods (CTM)
WebCalifornia Department of Transportation (Caltrans)2025 Standard Specifications
California Test Methods are the state-specific testing procedures used for acceptance of aggregates, asphalt, concrete, soils, and chemistry. CTM numbers (e.g., CTM 202, CTM 540) are referenced directly in the Standard Specifications.
Local terminology: California calls its materials & testing "California Test Methods" — the label used throughout this page reflects that convention.
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