Maintenance of highway plan

9. (1) The Highway Authority shall maintain authoritative plans for the highways in its charge. (2) Such plans shall show clearly the boundaries of the highway, the detailed measurements of road widths, the distances between boundary marks and sufficient measurements from fixed points to enable the refixation of the position of boundary marks, in case they have been displaced or tempered with. (3) The Highway Authority shall have all such authoritative plans prepared after having a survey made of the highway and their boundaries in the manner prescribed. (4) The Highway Authority shall have the boundaries of the highway in its charge demarcated with reference to the authoritative plans maintained by it, by planting stones or other suitable marks of a durable nature at intervals all along the highway in such a manner that the imaginary line joining such stones or marks shows the road boundary correctly. (5) Where there are bends or kinks in the road boundary, the stones or marks shall be so located as to ensure the correct configuration of the boundary if they are joined by straight lines. (6) The boundary stones or marks, which may be given consecutive numbers, shall be maintained on the ground as if they constitute part of the highway.