Having a detailed photographic record of each highway, its appurtenances, and its adjacent features, is advantageous for evolving maintenance programs, correcting defects, and eliminating hazards. The pictorial record, however, unless it can be used for determining position, spacing, and relevant dimensions wherever required is not fully effective. Techniques are presented for computing dimensions, using measurements made on the photographs taken singly and at a longitudinal spacing of known length along the highway, or at random, if necessary. Tests indicate position and dimension determined using the developed equations do not differ by more than 5% from actual values. Greater precision is feasible, if fiducial marks are provided and accurate positioning of the perspective center is readily obtainable.