This recommended practice provides guidance for designing new hot mix asphalt (HMA) that incorporates reclaimed asphalt shingles (RAS). Specific guidance includes design considerations, how to determine the shingle aggregate gradation, how to determine the performance grade (PG) and percentage of the virgin asphalt binder, and how to estimate the contribution of the shingle asphalt binder to the final blended binder. Note 1 - Refer to MP 15 for information specifying the use of RAS in HMA.