One of the activities that can most influence climate neutrality is the activity of infrastructure construction. Some countries already include environmental concepts in the development of their infrastructures, as an approximation to neutrality, but this is insufficient, it is necessary to be more ambitious, and define in a broad and global way, a governance framework that includes this concept in detail, throughout their life cycle. To this end, a methodology is proposed that defines the neutrality of infrastructures based on circularity, including this concept in governance processes, through circularity indicators. In addition, to show its validity, it is applied to the contracting in the construction phase of the A-67 Highway project, Capacity Expansion, in Spain. Obtaining very good improvements in infrastructure governance, thus contributing to climate neutrality.