Can we mask strings (including master string) in Pavement layer and Subgrade Design (For existing pavement) option? I would like to generate cross section in which only service road strings required (only SR INNER-OUTER STRING, SR SHOULDER AND THE EXISTING PAVEMENT PORTION) . The pavement layers of service road are designed according to the existing layers there. we can do it in Pavement layer and Subgrade Design option but for Pavement layer and Subgrade Design (For existing pavement) i am not getting any reasonable method.