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src="https://screencast.autodesk.com/Embed/Timeline/0fbf1fe3-3c9c-4795-9d5e-3dfbe08d5e05" width="640" height="680" frameborder="0" scrolling="no" allowfullscreen="allowfullscreen" webkitallowfullscreen="webkitallowfullscreen"></IFRAME></DIV> <DIV id="35f7477c-5b51-4d1e-aca1-6dcd041d34b9" class="myscreencast-iframe iframe-container" style="display: none;"><IFRAME src="https://screencast.autodesk.com/Embed/Timeline/35f7477c-5b51-4d1e-aca1-6dcd041d34b9" width="640" height="620" frameborder="0" scrolling="no" allowfullscreen="allowfullscreen" webkitallowfullscreen="webkitallowfullscreen"></IFRAME></DIV> <DIV id="fa65914f-3cf9-43d5-b00f-4dc8335a041e" class="myscreencast-iframe iframe-container" style="display: none;"><IFRAME src="https://screencast.autodesk.com/Embed/Timeline/fa65914f-3cf9-43d5-b00f-4dc8335a041e" width="640" height="620" frameborder="0" scrolling="no" allowfullscreen="allowfullscreen" webkitallowfullscreen="webkitallowfullscreen"></IFRAME></DIV> <DIV id="166309c7-b1cb-4df3-b9cb-476a86dca229" class="myscreencast-iframe iframe-container" style="display: none;"><IFRAME src="https://screencast.autodesk.com/Embed/Timeline/166309c7-b1cb-4df3-b9cb-476a86dca229" width="640" height="620" frameborder="0" scrolling="no" allowfullscreen="allowfullscreen" webkitallowfullscreen="webkitallowfullscreen"></IFRAME></DIV> <DIV id="312bbb83-3d7c-4368-9f16-33fd79f40c0d" class="myscreencast-iframe iframe-container" style="display: none;"><IFRAME src="https://screencast.autodesk.com/Embed/Timeline/312bbb83-3d7c-4368-9f16-33fd79f40c0d" width="640" height="680" frameborder="0" scrolling="no" allowfullscreen="allowfullscreen" webkitallowfullscreen="webkitallowfullscreen"></IFRAME></DIV> <DIV id="06d47428-71c1-4618-aa21-321c331bfad4" class="myscreencast-iframe iframe-container" style="display: none;"><IFRAME src="https://screencast.autodesk.com/Embed/Timeline/06d47428-71c1-4618-aa21-321c331bfad4" width="640" height="620" frameborder="0" scrolling="no" allowfullscreen="allowfullscreen" webkitallowfullscreen="webkitallowfullscreen"></IFRAME></DIV> <DIV id="c2edf8ef-f69f-4bcf-ac22-135635e72ecd" class="myscreencast-iframe iframe-container" style="display: none;"><IFRAME src="https://screencast.autodesk.com/Embed/Timeline/c2edf8ef-f69f-4bcf-ac22-135635e72ecd" width="640" height="620" frameborder="0" scrolling="no" allowfullscreen="allowfullscreen" webkitallowfullscreen="webkitallowfullscreen"></IFRAME></DIV> <DIV id="20faa57d-40c6-43a7-a964-54b0359a93f1" class="myscreencast-iframe iframe-container" style="display: none;"><IFRAME src="https://screencast.autodesk.com/Embed/Timeline/20faa57d-40c6-43a7-a964-54b0359a93f1" width="640" height="650" frameborder="0" scrolling="no" allowfullscreen="allowfullscreen" webkitallowfullscreen="webkitallowfullscreen"></IFRAME></DIV> Sun, 07 Jun 2020 22:07:29 GMT tcorey 2020-06-07T22:07:29Z https://forums.autodesk.com/t5/civil-3d-forum/designing-interchange-loop-ramp/m-p/9565187#M93815 <P>Hello,</P><P>&nbsp;</P><P>I need to design a loop ramp for a partial cloverleaf interchange.</P><P>The loop is designed from <STRONG>tangent-spiral in-curve-spiral out -tangent</STRONG></P><P>as seen in example attached file.</P><P>I enclose an example I created with other software. I am trying to do that with civil.</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="screenshot.PNG" style="width: 400px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/780839iAD2117ED28AD450A/image-size/medium?v=v2&amp;px=400" role="button" title="screenshot.PNG" alt="screenshot.PNG" /></span></P><P>&nbsp;</P><P> </P><P>&nbsp;</P> Sun, 07 Jun 2020 10:29:09 GMT https://forums.autodesk.com/t5/civil-3d-forum/designing-interchange-loop-ramp/m-p/9565187#M93815 Anonymous 2020-06-07T10:29:09Z https://forums.autodesk.com/t5/civil-3d-forum/designing-interchange-loop-ramp/m-p/9565277#M93816 <P>What you have submitted is just a polyline.</P> <P>&nbsp;</P> <P>Bill</P> <P>&nbsp;</P> Sun, 07 Jun 2020 12:38:14 GMT https://forums.autodesk.com/t5/civil-3d-forum/designing-interchange-loop-ramp/m-p/9565277#M93816 wfberry 2020-06-07T12:38:14Z https://forums.autodesk.com/t5/civil-3d-forum/designing-interchange-loop-ramp/m-p/9565284#M93817 <P>I know that, it is just an example.</P><P>I have attached now a civil file, I would like to add the spiral as I mentioned above.</P> Sun, 07 Jun 2020 12:49:38 GMT https://forums.autodesk.com/t5/civil-3d-forum/designing-interchange-loop-ramp/m-p/9565284#M93817 Anonymous 2020-06-07T12:49:38Z https://forums.autodesk.com/t5/civil-3d-forum/designing-interchange-loop-ramp/m-p/9565286#M93818 <P>No file attached.</P> <P>&nbsp;</P> <P>Bill</P> <P>&nbsp;</P> Sun, 07 Jun 2020 12:52:22 GMT https://forums.autodesk.com/t5/civil-3d-forum/designing-interchange-loop-ramp/m-p/9565286#M93818 wfberry 2020-06-07T12:52:22Z https://forums.autodesk.com/t5/civil-3d-forum/designing-interchange-loop-ramp/m-p/9565290#M93819 <P>sorry...</P> Sun, 07 Jun 2020 12:59:03 GMT https://forums.autodesk.com/t5/civil-3d-forum/designing-interchange-loop-ramp/m-p/9565290#M93819 Anonymous 2020-06-07T12:59:03Z https://forums.autodesk.com/t5/civil-3d-forum/designing-interchange-loop-ramp/m-p/9565630#M93820 <P>To add a free spiral between curve and tangent you need first disconnect between them (for example add a PI and then delete sub-entity ) then make sure that both of curve and tangent have tangency constraints fixed finally add a free spiral between these entities</P><P>&nbsp;</P> Sun, 07 Jun 2020 18:04:01 GMT https://forums.autodesk.com/t5/civil-3d-forum/designing-interchange-loop-ramp/m-p/9565630#M93820 Mohamed.E.Salem 2020-06-07T18:04:01Z https://forums.autodesk.com/t5/civil-3d-forum/designing-interchange-loop-ramp/m-p/9565832#M93821 <P>&nbsp;</P> <DIV class="iframe-container" style="position: relative; height: 0; margin: 0; padding-bottom: 106.25%;"><IFRAME width="640" height="680" style="position: absolute; left: 0; top: 0; width: 100%; height: 100%;" src="https://screencast.autodesk.com/Embed/Timeline/a132a7b5-35b5-4863-8a81-b37674873bd3" frameborder="0" allowfullscreen="true" webkitallowfullscreen="true" scrolling="no"></IFRAME></DIV> <DIV id="8b27a066-d984-4896-8c58-9a50a6bbd0ae" 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src="https://screencast.autodesk.com/Embed/Timeline/312bbb83-3d7c-4368-9f16-33fd79f40c0d" width="640" height="680" frameborder="0" scrolling="no" allowfullscreen="allowfullscreen" webkitallowfullscreen="webkitallowfullscreen"></IFRAME></DIV> <DIV id="06d47428-71c1-4618-aa21-321c331bfad4" class="myscreencast-iframe iframe-container" style="display: none;"><IFRAME src="https://screencast.autodesk.com/Embed/Timeline/06d47428-71c1-4618-aa21-321c331bfad4" width="640" height="620" frameborder="0" scrolling="no" allowfullscreen="allowfullscreen" webkitallowfullscreen="webkitallowfullscreen"></IFRAME></DIV> <DIV id="c2edf8ef-f69f-4bcf-ac22-135635e72ecd" class="myscreencast-iframe iframe-container" style="display: none;"><IFRAME src="https://screencast.autodesk.com/Embed/Timeline/c2edf8ef-f69f-4bcf-ac22-135635e72ecd" width="640" height="620" frameborder="0" scrolling="no" allowfullscreen="allowfullscreen" webkitallowfullscreen="webkitallowfullscreen"></IFRAME></DIV> <DIV id="20faa57d-40c6-43a7-a964-54b0359a93f1" class="myscreencast-iframe iframe-container" style="display: none;"><IFRAME src="https://screencast.autodesk.com/Embed/Timeline/20faa57d-40c6-43a7-a964-54b0359a93f1" width="640" height="650" frameborder="0" scrolling="no" allowfullscreen="allowfullscreen" webkitallowfullscreen="webkitallowfullscreen"></IFRAME></DIV> Sun, 07 Jun 2020 22:07:29 GMT https://forums.autodesk.com/t5/civil-3d-forum/designing-interchange-loop-ramp/m-p/9565832#M93821 tcorey 2020-06-07T22:07:29Z