I have used a M&O sub on the end set to match slope and 0.0001 thickness.
Your Name
Did you find this post helpful? Feel free to Like this post.
Did your question get successfully answered? Then click on the ACCEPT SOLUTION button.
Your Name
Aside from using a grading you can also treat the end like an intersection by creating an alignment representing the end of the road, sampling the corridor surface and either applying an assembly to the alignment or create a grading from a featureline generated from the alignment+profile. It's probably a prohibitive amount of work but it is an option.