In our legacy software we could quickly and easily apply a reverse cubic curve tapers for our designs without having to create Geometry and have our lane edges follow that - noting that the Geometry is not actually the required reverse cubic curvature.

Our standards require lane merges and diverge to have reverse curvature and since going to ORD our users have had to laboriously now create (incorrect) geometry to get this curvature.

We need an option to have horizontal point controls be able to apply tapers as reverse cubic type curves - perhaps a setting in the Corridor Feature Definition - "Apply Horizontal Tapers with Cubic reverse curves" so the user can control where they use this.

Note that it doesnt have to be the "real" reverse cubic geometry but it could be the stroked representation to ensure the 3d features are representing it enough for setout.

Below is a link to the formula we previously used:

Cubic reverse taper