This tool places the horizontal alignment by using PI points.

The user is prompted to place data points. As the user places points, they are temporarily linked by a visible line, and from the second point onward, the user is prompted for the arc radius, feature definition, and start and end spiral lengths for the next angle. When the user right clicks, a complex horizontal alignment is created from the points where a curve set composed of spirals and arcs is created on each PI.

Link to project files - Download