OpenRoads: vertical curve definition

Hi All,

I have a 30 km longhighway schema. Client requirement is to design vertical profile with vertical curves set as circural elemetns.  I set in Civil settings vertical curve parameter to Rvalue. 

Designing vertical alignment goes quite seamles. I added a number of vertical  circural curves with approperiate tools with no problemems at all. The problem occures when I need to export my geometry back to native (InRoads) alg file. It stops importing vertical alignment on the firs station where Reverse Profile Transistion was used. I genereated report and was surprised to find out that this transition was definied with parabolas.

In alg file we must not have mixed vertical curve types. I hopped to change InRoads option for Geometry to enforce parabolic definition but it switches back to circural on every export try. It looks that when the firs openroads element matters: if it is a circural arc - alg would have circural definition set for cvertical curves. If it is parabola, the alg definition would be set to parabolic type.

With all that being said, now I want to annotate my profile. Can not be done without alg file and I can not create that file now. I need to delete all elements created with Reverse Profile Transition and redesign my vertical profile. The  workflow would be needed as well if someone accidently mixed vertical curve types in civil geometry.

Is there a tool to design reverse profile transition with ircural elements? Is there a way to avoid mixing vertical curve types when designing profile. Is there a way to unify vertical curve types on export to alg file?

Thanks.

Adam

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  • Sorry, I see now in your original post why you are combining the two types. The Profile Reverse Transition command only constructs parabolas. This is probably the true request here... to enhance the Profile Reverse Transition command to allow circular vertical curves.
    As a workaround, I was able to build reverse circular curves using the Circular Curve From Element, Circular Curve Between Elements, etc... commands. These commands should be able to build what you need for the transition, just a little more manually that the one command.
  • Kevin,

    Neither I have heard of anyone combining two types of vertical curves. But with OpenRoads tools it is very easy to do it accidently. There is no kind of switch to change vertical curve type and you can just choos wron tool icon from your task. Moreover when you set in civil settings Rvalue for curve parameter it is even more confusing. Like in example with Reverese Profile Transition - I key-in R value and it looks fine. The only info it is parabola you can find either in report or in element information. Even in help file for that tool it is not specified it would create parabolas.

    Your workaround it is what I acctualy did - I just deleted all reverse transition from my 30 km long profile and replaced these with circural arc from element an an arc between elements. It is not a big deal. The problem is that you can easy mix vertical curve types when creating your alignment. My idea is to modify task bar but then you will have more environemnts to manage. cumbersome when you are working on a few projects simultanously.

    Adam

    Best,

    Adam


    OpenRoads Designer 2023   |  OpenRail Designer 2023