I am trying to develop geometry for an interchange where the ramp baselines are linked to the mainline and intersecting roadway baselines. I have managed to develop the horizonal geometry so that if the mainline or intersecting roadway geometry is adjusted the corresponding ramp baselines adjust with them. I cannot manage to do this with the vertical geometry. With some effort I am able to develop vertical geometry that is linked. When I try to adjust it with the table editor the links seem to be broken or the adjustments to the geometry are not saved. Can this even be done. If so can what might I be doing wrong.
Jeffrey,
You should be able to achieve this by utilizing the Profile Intersection Point tool under the vertical geometry tools. This tool will display the point at which the mainlane intersects the ramp geometry. If you snap the ramp geometry to the intersection point that displays in the ramp profile view, the ramp vertical geometry will update anytime the mainlane vertical geometry updates.
Jennifer Perry
Highway Design | Johnson, Mirmiran & Thompson, Inc.
I have been able to get the profile to link to the intersecting road using this and with the mainline where the ramp baseline runs parallel to the mainline using the by vertical offset command. My problem is It does not seem to let me adjust the ramp baseline though the table editor afterwards without breaking the links.
When using the vertical offset command, are you defining that as the ramp geometry? Or are you creating separate geometry and snapping the separate geometry to the vertical offset geometry?
I assume that you are utilizing the table editor after the fact because you do not want certain sections to run parallel to the mainlane? If that is the case, I would suggest creating separate geometry and snapping the separate geometry to the vertical offset geometry so that you can edit the sections that you want to vary from the mainlane.
I was trying to use the vertical offset geometry. Are you suggesting that I display the vertical offset geometry which would be linked to the mainline profile and then create geomtery that would be linked to the vertical offset geometry?
Yes, that's correct. It is breaking when you use the editor, because it is initially ruled to the main geometry. When you use editor, you are changing the rules.