Hello,
I have a divided highway in two different corridors (east bound/west bound). I have a median ditch in the center. I would like to somehow find the intersecting points of both slopes to create my ditch. I have created two separate models and used target aliasing in one corridor to show me the slope of the other corridor as shown in the pic below. Is there any way Geopak can find the intersectios of the two slopes?
Hi Dale,
This task is fairly simple when in fill although as per the example above you have to deal with the fact the end condition will not extend without a surface. I would remove the end condition from the RHS corridor and edit the template drop of this particular range to include the ditch invert and the RHS top of drain (that was removed in the RHS corridor). The ditch would be define by 2 slopes and you could then use a point control for the RHS top of drain to match the corridor edge of the other carriageway.
Hope that helps, Dan
im not sure I follow Dan. What do you mean by RHS? I don't have the ditch invert, that is what I want to achieve by finding the intersection of the two slopes. Sorry if I'm not understanding.
I am using SS2.
I googled target aliasing inroads and it returned the PDF from Colorado DOT. This link is the TOC to all of their tutorials. It has zip files with the data sets.
www.coloradodot.info/.../labs-for-inroads-xm
That same google search returned video links and some pages in these forums. As I said, I have used target aliasing successfully in the past. But to try and talk you through it, I'd have to dig up those projects, re-learn its workflows before I could share the knowledge - with this, you will have worked through an example before I can even locate and re-learn the tool.
(It took three tries to get this link working.)
Charles (Chuck) Rheault CADD Manager
MDOT State Highway Administration
Answer Verified By: Chuck K.
Thanks CADDCOP, I went through the material and it somewhat worked. In target aliasing I brought in both my corridor and proposed surface. It will not target the corridor but did target the surface. The only problem is, is when the proposed surface came in, the top of pavement looked correct but the slope was not a perfect 1:4 like in my template or in my corridor. So I don't know why it is not a perfect 1:4. I also tried Daniels suggestion with no success. Can someone from Bentley chime in? Thanks for the help everybody.
If the two corridors are not perfectly parallel, the slope for one will be correct, but the other will be skewed. Also, it is also possible that the resulting slopes will not retain their original triangulation resulting in triangles that cross multiple template drops and often the resulting slope is different than if the triangles formed along each template drop. When this happens, adding longitudinal breaklines will force the correct triangulation.
Do you know if there is a way to solve this situation with Geopak SS4? What about OpenRoads Designer?
Thanks.
Quite interested myself here.
If you are looking for Ss4/10 workflows in any Civil Platform, the Corridor tools are identical. We took a MoDOT workset for corridor migration from Ss2 to Ss4/10 that was developed in GEOPAK and used it in InRoads. You can generally use alg and dtm files from InRoads in any platform as part of the tools in Ss2/4/10.