Highway Culvert

Highway culvert under the two-lane road where it crosses a dry wash: a pair of 1.2 m corrugated steel pipes, or a single 2.4 x 1.2 m concrete box, running 12 m across the road's fill, with a cast-concrete headwall and splayed wing walls at each end.

风格：low-poly, flat-shaded vertex colors, no textures, single shared material, so any set of these merges to one draw call; shares palette and scale with its kit