“…The exact expression "pavement management", which was employed in the search engine, occupied the 2nd place (in 252 documents). Nevertheless, other highly related expressions, including the word "pavement", were employed as keywords with a high incidence: "pavement performance" (75 times), "pavement condition" (73), "concrete pavements" (60), "pavement maintenance" (58), "pavement overlays" (56), "flexible pavements" (53), or "asphalt pavements" (51). In addition, the analysis of the main keywords, which did not include the "pavement" word, supported the previously exposed idea: the improvement of the classical PMSs by incorporation of new optimization strategies to ensure a better planning and administration framework, as the presence of keywords such as "maintenance", "highway administration", "decision making", "mathematical models", or "optimization" demonstrated.…”