Modeling method of complex road

The invention discloses a modeling method of a complex road. The modeling method comprises the following steps of: 1, defining a basic road model element base, to be specific, (1), determining attributes of roads; (2), determining geometries of the roads, wherein the geometries of the roads comprise a linear road, a circular curve road, a clothoid road, a flat road, slopes including an upward slope and a downward slope, vertical curve roads including a convex curve road and a concave curve road according to the horizontal direction and the vertical direction; (3), setting geometry parameters of the roads, wherein in a process of actually designing the roads, multiple factors are considered, road basic parameters corresponding to different designed velocities are generally different, and design parameters of all basic road models in the modeling method all refer to road rout design specifications 2006 in China; (4), determining the clothoid road; (6), defining grades of unevenness of the roads; 2, establishing the basic road model element base; 3, designing a road connecting method; and 4, extracting a basic rod element to generate the complex road.