AutoCAD Civil 3D :: Shoulder Subassembly That Varies Slope In Relation To Lane Superelevation Slope

Jan 22, 2013

i need a shoulder subassembly that varies slope in relation to the lane superelevation slope. i know that i can get a subassembly for the shoulder that will follow the alignment superelevation xml data but in my case i can't use it because we are just adding a shoulder to an existing road. we're not changing the superelevation of the existing road, just milling and overlaying and widening. right now i've created a profile of the outside edge of the shoulder that gives me the correct shoulder slope but whenever i change my centerline profile i have to redo the shoulder profiles which is a real time suck.

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AutoCAD Civil 3D :: How To Match Gutter Slope To Outside Lane Super Subassembly Slope

Mar 22, 2011

Can't figure out how to match gutter slope to outside lane super subassembly slope.  Have super eop targeting a feature line with elevations, but when i check section editor gutter slope doesn't match pavement slope.

Civil3D 2013
Windows 7, 64 bit
Intel i7 2600 @ 3.40Ghz
Nvidia Quadro 600

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AutoCAD Civil 3D :: Superelevation For 1-Lane Ramp (different Shoulder Widths)

Apr 3, 2013

 I'm attempting to use the Superelevation tool on an interchange.  I have 4, 1-lane ramps that I need to apply superelevation to.  The three issues I have (so far) are:

In the Calculate Superelvation Wizard...

1. In Roadway Type, I don't know what to choose, I'm leading toward Undivided Crowned (center Baseline ) because my assembly (as of right now) is set up as an undivided crowned roadway (with the crown on the west travel lane edge). Which Roadway Type I should choose (for a 1-lane Ramp with different shoulder widths?)

2.  Moving on to the the Lanes category doesn't matters.  I uncheck symmetric Roadway, hoping I can choose "0" for the number of lanes on the Left, or at least put the lane width down to "0" but can't do either.  I uncheck the Symmetric Roadway and it still makes everything symmetric (it acts as though it is still checked?) I only want to show a single 15' lane.  (I even tried to use undivided planar, and put both lanes at 7.5'each, but then I still have shoulder issues...)

3.  Move to the Shoulder Control.  Why doesn't it give me the option to do different shoulder widths?  On ramps it is very common (at least in Wisconsin) to have an 8ft shoulder on the right and a 4ft shoulder on the left.  How can I type in 2 different shoulder widths.

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AutoCAD Civil 3D :: Adjust Superelevation / Cross Slope Transition On Intersection

Dec 19, 2013

In attached file the normal cross slope of secondary road(AB)  is 2% Right to left (Right higher). and for primary road cross slope is 2% Left to Right (Left higher). I produced this junction using intersection wizard and cross slope of secondary road only starts changing from start of curb return to match the long slope of primary road. Is this possible to increase this transition lentgh on secondary road to create smooth contours.

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AutoCAD Civil 3D :: Digital Record Of Existing Road Lane Slope

Feb 6, 2013

Civil 3D 2012 (or Civil 3D 2013)

Without automation development, what is the procedure to get a digital record of the existing road lane slope?

I recommend the following:


Use the OverlayWidenMatchSlope1 rehab subassembly to build a corridor, targeting the existing road surface


Make a report using Corridor > Feature Line Report, reporting the Links to get the slope

Am I correct?

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AutoCAD Civil 3D :: Profile Geometry Editor - Slope-Slope Intercept To Place PVI

Aug 20, 2012

Can you not perform a slope-slope intercept to place a PVI?  Essentially holding the sta and elev of the PVI's directly before and after the PVI of interest and changing the grade in and out so that the sta and elev of the PVI of interest are changed.

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AutoCAD Civil 3D :: Slope To Depth Of 10 Feet Than Change To 2:1 Slope

Aug 13, 2012

I am in the process of transitioning from land desktop to Civil 3D. I design roads in steep terrain and sometimes need to have my catch (daylight) slopes change. So my question is, how do I change a daylight slope at a specified depth? For example, from the shoulder of the road I want a 3:1 fill slope to a depth of 10 feet than change to a 2:1 slope until it catches the existing surface. Can this be built into a subassembly such that if the fill is less than 10 feet it will daylight correctly at a 3:1 and if the depth is greater than 10 feet then it carries the 3:1 for 10 vertical feet and then changes to the 2:1 until it daylights?

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AutoCAD Civil 3D :: Subassembly Composer - Link Slope To Elevation

Oct 8, 2012

Its a embankment crest (dam wall) and then sloping down at an angle to a target elevation. I want it to shoot through my topo / surface and then apply a boundary later.

It looks fine in Composer but doesn't show up in C3D - only straight line. Would like the same outcome as the Generic Link Code - LinkSlopetoElevation.

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AutoCAD Civil 3D :: Subassembly Composer - Variable Ditch Bottom With Slope And Delta Y

Oct 22, 2012

I'm trying to build the ditch portion of my Subassembly backwards from an offset target "DitchOffset". The elevation of this point should be derived from a point that is using Slope and Delta Y from point "P12" (see attached). Must be at least 1m from the bottom of SubBase with a 5:1 slope. 

The Ditch Bottom will be variable width. I'd like to be able to select my offset alignment for my ditch bottom. Have a link from this point extend at a slope to the Target Surface to complete the foreslope.

I can't quite picture how to complete the links from the DitchOffset point. This may be complicated but the diagram identify what I'm trying to do.

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AutoCAD Civil 3D :: Overriding Superelevation Using Outside Lane Elevation Method

Oct 23, 2013

In my corridor I have used superelevation.  In a horizontal curve which has a cross slope of 4.5%, I have an intersection.  To allow for a smoother ride through a few lanes in the intersection I want to change the cross slope from 4.5% to 1%.  I was planning on doing this by using a Outside Lane Elevation Method of a Profile.  However, it appears that my super has precedence over my profile.  Is there are way to make this work?

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AutoCAD Civil 3D :: Shoulder Subassembly - Target Width Alignment At Grade Break

Nov 5, 2012

I am trying to model a DOT project in a fashion that allows a corridor surface creation for not only the finished surface, but also the datum surface. This is a machine control project currently under construction. One of the DOT's typical sections includes a shoulder subassembly with a grade break in it. This particular assembly varies in width at the grade break. I would like to have the option for a target width alignment at the grade break.

See attached sketch.

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AutoCAD Civil 3D :: Subassembly Composer Superelevation

Jul 23, 2013

How to use the superelevation. I read that I have to enter this command:

if((Side=Left)AND(SE.HasLeftLO), SE.LeftLO,
if((Side=Right)AND(SE.HasRightLO), SE.RightLO,

but I don't know where, and I just want to create a simple assembly with a slope and delta X and having a lane outside superelevation for the both side.

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AutoCAD Civil 3D :: Subassembly Composer Superelevation

Feb 13, 2013

I am working with SAC , and cant understand how that superelevation works, how to make my models work in CIvil 3d in superelevations... how to build it properly in SAC.  I would rly love to get .pkt file with working model as example  , or at least get some usefull tip.

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AutoCAD Civil 3D :: Import Lane Toward Crown Subassembly

Feb 22, 2012

I tried to import the Lane Toward Crown subassembly to my Lanes tab, but the import function looks for *.pkt files and all I have in the Stock Subassemblies folder are *.vb files.

How can I get the *.pkt files?

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AutoCAD Civil 3D :: Subassembly Composer - Lane Assembly Targeting

Nov 19, 2013

I create Curb Return Fillet assembly with shoulder in SAC , but now i have problem with targeting , when i giving two targets it takes only first target and ignores second,   could you check attached assembly and drawing ?

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AutoCAD Civil 3D :: Autodesk Subassembly Composer 2013 - Lane Outside Condition?

Jan 31, 2013

Does the 2013 subassembly composer include a way to include a condition based on LANE-OUTSIDE-SLOPE?

The figure below indicates the type of condition I would like to include (red arrows).

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AutoCAD Civil 3D :: Slope Map Display

Jul 1, 2013

The undefined areas of a slope map now have a hatch to them and are plotting black. This map was created a month ago in 2012 without issues, upgraded to 2014 and now the undefined range has hatch! 

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AutoCAD Civil 3D :: Get The Slope At A Point (x And Y)?

Jan 2, 2012

I have a TIN Surface, and I want to get the slope at a point (know X and Y).

Working Civil 3d 2010 and API.NET

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AutoCAD Civil 3D :: Using Negative Cut Slope

Oct 30, 2012

I have a simple driveway corridor along a steep hillside.  For cut, I would like to have a negative slope away from the shoulder edge.  I have tried numerous approaches and all 'cut' reverts to positive.  I searched and found no clear answer.  It's such a short driveway, I can 'fake' it in, but I would like to calculate quantities. 

Using 2012 sp1, 64bit, windows 7

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AutoCAD Civil 3D :: Can't Display More Than Two Slope Ranges

Jul 8, 2013

I've got a surface that displays contours correctly. When I go to Surface Properties-Analysis tab, I can  set an arbitrary number of ranges for contours, directions, elevations, slope arrows, etc, and they display correctly.

I can set an arbitrary number of ranges in the slope range box too, but when I click the Analyze button, Civil 3D 2014 hotfix 1 only displays two slope ranges: 0% to 2979736.0077% and 2979736.0077% to 99999900.0001%. (!)

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AutoCAD Civil 3D :: Auto Slope Patterns?

Aug 10, 2013

Can I automatically have my slope patterns introduced with a command like matchprop or something similar ?

I have 284 streets and it's getting ages to finish the slope patterns on every street. Civil Engineer / Infrastructure of metropolitan transports. URL....

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AutoCAD Civil 3D :: How To Round Off Top Of Graded Slope

Mar 21, 2013

I'm trying to match an existing slope design that has a soft rounded off top of slope.  The toe (green) is a feature line and I'm using a 1-1/2:1 slope to natural surface grading rule.  You can see the rounded contours in blue that I am trying to match.  

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AutoCAD Civil 3D :: Link Slope To Surface

Nov 7, 2012

in my link "link slope to surface", i have the slope set to -2.00%. in the cross sections, it is at a +2.00%. why is this thing not linking at the defined -2%? see image.

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AutoCAD Civil 3D :: Determine Elevations Along Slope

Dec 3, 2013

I need to project a surface/grading (or something of that nature) across my berm and have it intersect with the inside bank. This is better explained if you see the attached image. In the plan view you see 4 featurelines. Outside TOE, outside TOB, inside TOB then inside TOE. I need to project the outside TOE across the berm (shown in the section view) then create a new featureline where the line and inside slope of the berm intersect. Note that all the elevation shots vary as does the widths across the berm. What's the best way to do this?

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AutoCAD Civil 3D :: How To Calculate Average Slope

Feb 20, 2013

What formula Civil3D uses to calculate the average slope of a surface?

The formula I am using is S = I*L/A

S = Average Slope
I = Contour Invertval
L = Length of Contours (ft)
A = Area of parcel (sq. ft)

I just had to do four parcel calcs and the percentage I find using the formula is always 1-3% lower than the percentage Civil3D spits out. I can't find anything about how Civil3D arrives at that number, it just appears. I assume that Civil3D is more accurate but I can't give that number to a client without knowing how the program arrived there.

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AutoCAD Civil 3D :: PVI Profile On Corridor Slope

Oct 1, 2012

I created a profile view in order to create a corridor, I want the profile PVI stations to be on the same plane,

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AutoCAD Civil 3D :: Superelevations And Sub-base Slope

Jun 11, 2012

I need to have a subassembly for a superelevation where the lane and base slope to the left and the bottom of the sub-base will slope to the right. I was using the LanSuperelevationAOR subassembly, which worked fine with my superelevation when the lane, base and sub-base were all sloping the the left, now I need to edit the slope of the sub-base only to slope back to the right at a -2%.

Windows 7 x 64
8GB Ram
Intel Xeon CRU 4 Core @ 3.07GHz
Civil 3D 2012 .....

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AutoCAD Civil 3D :: Slope Analysis - Ranges Set To 10

Oct 12, 2006

I can not get the slope analysis to come up with 10 slope ranges. My ranges are set to 10, but my Range details populate to 22? Screen Cap included. I've tried this with Equal Interval, Quartile, and Standard Deviation. Nothing will create 10 intervals.

My "slope analysis" surface style is set to show Slope, with the range set to 10. In surface properties, my range is set to 10.

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AutoCAD Civil 3D :: Slope Symbols For 3d Polylines

Sep 20, 2013

I use slope symbols instead of contours to keep my maps less busy.  Unfortunately I can only change my cut style and fill style to slope symbols with grading by right clicking on the little diamond in the grading and selecting grading properties.

I have created a surface with 3d poly lines not by creating grading and got contours that way, How can I create the slope symbols in a surface.  I tried xploding them and then creating a block and using the measure tool on the 3d polylines but it doesn't do anything. 

Picture 01 is the contours

Picture 1 is the contours turned off and cut/fill styles turned to slope symbols.

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AutoCAD Civil 3D :: Slope Of Surface After Kriging

Apr 5, 2013

Please find the attached picture. It shows a surface with its data points. I extended the surface to the outer boarder shown by kriging. The slope of the surface that was added with the extension (past the data points) has an upward slope that was generated. I need the surface to stay level with the data points that are there.

How to avoid that added slope when extending a surface?

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AutoCAD Civil 3D :: Add Slope Markings On Corridors

Apr 18, 2012

Trying to add slope markings on my corridors, and the only way I can find is to do it in the Corridor properties > Slope markings, then click add slope pattern, which asks you to select featurelines top and bottom of slope.  Surely there is a way to simply switch on or off slope markings where in cut or fill?

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