The invention provides a road fine design method. A plurality of digital cameras are carried on an unmanned aerial vehicle flight platform at high altitude above a road to generate a
centimeter-levelthree-dimensional live-
action model of the road; then the digital
terrain model is extracted and imported into a BIM design platform for
terrain visual analysis, horizontal and longitudinal geometricanalysis, road
subgrade and pavement design and scheme comparison and selection, the design accuracy is improved,
field survey work is reduced, the advantages of intelligence, high flexibility and
visualization are achieved, field environment live-action
simulation is achieved, and the safety of the design scheme is ensured; the survey efficiency and precision are improved while the labor intensity is reduced; schemes are quantitatively compared and selected, so that the
engineering cost is reduced; three-dimensional visual service is provided for shortcut line
decision making, accurate
simulation is achieved, disordered phenomena such as disordered digging, disordered filling, disordered building and environment damage are avoided, and the method is green, energy-saving and
environmentally friendly; the method can be used for road design, and can also be used for construction process monitoring, accurate calculation of
engineering quantity change, potential safety
hazard investigationand the like.