A well-studied scheme delivers only if it is built as designed. Rahyaft supervises transport study and implementation schemes and takes on design and site supervision of road construction projects. In design supervision, the consultant answers the questions the design raises during construction and reviews any changes to it; in site supervision, the supervisor is on site and checks the quality and quantity of the contractor's work against the drawings and specifications.
Clients are mostly municipalities and transport and traffic organisations. Examples include design and site supervision of traffic signs, traffic equipment and road safety projects across Tehran for the Tehran Transportation and Traffic Organization, site supervision of transport and traffic projects for Tehran Municipality Region 12, and design supervision of traffic projects for Region 21.