3 篇文档带有标签「Curve」

Horizontal curves define how vehicles turn on the map. A practical alignment usually combines tangents, circular curves, and transition curves to balance terrain avoidance, comfort, and stability.

Minimum radius connects design speed, superelevation, and available side friction. Smaller radii require higher lateral acceleration, which may trigger comfort or stability warnings.

A transition curve is not the primary control element that defines the route. It is a connecting element placed between controlling tangents, arcs, or other alignment units. A tangent has zero curvature, a circular arc has constant curvature 1/R, and the transition curve changes curvature continuously between them.