This tutorial demonstrates how to use Autodesk civil 3D objects to build a basic Corridor model note this tutorial uses the corridor assembly that you built in the creating and assembly exercise a corridor can be used to model a variety of features such as highways channels and runways in this tutorial you will model a residential Road a corridor model Builds on and uses various Autodesk civil 3D objects and data including sub-assemblies assemblies alignments feature lines surfaces and profiles Corridor objects are created along one or more horizontal bass Lines by placing a 2d section or assembly at incremental locations and creating matching slopes that reach a surface model at each incremental location let’s start by opening up the corridor-1a drawing in your tutorials folder then go to your home tab and then take a look at your create design panel next click on the corridor drop down and select corridor in the create Corridor dialog box let’s specify the following parameters alternatively you can select these buttons to pick the objects from the drawing let’s go ahead and name our Corridor we’ll call it First Street
for Baseline type we’re going to leave it at alignment and profile
our alignment will be First Street and we want to switch our profile surface to finish grade Center Line for the assembly let’s select primary Road full section for Target surface we’ll select existing grade now make sure that the check box for set Baseline and region parameters is checked off then click ok
we’ll open this up just a little bit more
now that we’re in the Baseline and region parameters dialog box go ahead to the RG Dash primary Road row and specify the following end station within the cell
then press enter
next let’s select the frequency by pressing this button
and within the frequency to apply assemblies dialog box under along curves we want to make sure that the value is set to at increment now for the curve increment we’re going to specify 3.
go ahead and select ok and select OK again now we have a notification that the corridor definition has been modified and needs to be rebuilt what would you like to do note if the task dialog box is not displayed the corridor is still built but in this instance we want to rebuild the corridor
as you can see our Corridor is now built along our Center Line
so that’s how you go about creating a basic Corridor model in civil 3D in this exercise you’ll create a corridor assembly with transitions so let’s go about creating an assembly Baseline go ahead and open up your corridor-2a drawing in your tutorials folder next go to your home tab and then to your create design panel and then select the drop down for assembly select create assembly and then we get a create assembly dialog box we’re going to give it a name of transition and we’re going to leave all of the rest of the defaults alone go ahead and click ok when the specify assembly baseline location prompt is displayed on the command line go ahead and click a point in the drawing to place the assembly I’m going to place it right over here
the viewport zooms to the assembly Baseline which looks like this so let’s go about adding a lane subassembly let’s go ahead and open up our tool palette
and then make sure we’re in the Civil Imperial sub-assemblies palette the way to go about making sure is to right click on the control bar
and we can select it right here now make sure you’re on the basic tab and then select basic Lane transition
under the advanced portion of our properties make sure that we’re on the right side and for the default width we’re going to specify 14 feet
for a depth we’re going to specify one foot and for transition we’re going to change offset and elevation
in the drawing click the marker point on the assembly Baseline
now you’ll see Elaine is drawn extending it 14 feet to the right with a slope of negative two percent and a depth of one foot let’s add a curb and gutter to this sub-assembly in the tool palette select basic curve and gutter and then go back to our Advanced properties
and make sure that we’re on the right side and with the gutter width of 1.25 feet in the drawing select the top right Edge of the lane to draw the carbon gutter now let’s add a sidewalk sub-assembly in the tool palette select basic sidewalk next go into your properties this is going to be on the right side again with the buffer width of two feet and for another buffer width of three feet in the drawing go ahead and select the back of curve
now let’s add a ditch sub-assembly in the tool palette select this sub-assembly next go into your properties and under Advanced we have a lot of options here but first we’re going to start off with the side we’re going to leave it right and we’re going to keep things simple we’re going to specify a three on one slope in the drawing go ahead and click the outside marker
in the tool palette go ahead and select basic Lane transition and then under Advanced we’re going to choose a side of left with a default width of 12 feet and with a depth of one foot for the transition
we’re going to hold grade and change offset in the drawing we’re going to select our marker point
on this side of the assembly Baseline
Elaine is drawn extending 12 feet to the left with a slope of negative two percent and a depth of one foot now let’s mirror the sub assemblies outside the right lane go ahead and press escape to exit the sub-assembly placement mode in the drawing on the right hand side of the assembly make sure you select the curb the sidewalk and the daylight sub-assemblies
right click and select mirror now select the marker point at the top left edge of our transition Lane now you can see that the sub assemblies are displayed on the left side of the assembly marker the mirror command creates a mirror image of the selected sub-assemblies all the sub-assembly parameters except for the side parameter are retained now note that the parameters of the mirrored sub-assemblies are not dynamically linked if you change a parameter value for a sub-assembly on one side of the assembly Baseline the change will not be applied to the opposite side so that’s how you go about creating an assembly with a transition Lane in civil 3D in this exercise you’ll create a corridor using the assembly created in the last exercise you’ll Target the width and elevation of the right lane Edge to a right alignment and profile and the left lane Edge to a polyline and a feature line this exercise continues from creating an assembly with a transition Lane so let’s specify the basic Corridor information note this exercise uses the corridor-2a drawing from the previous exercise or you can also open the corridor Dash 2B drawing in your tutorials folder so let’s start by going to your home tab and then to your create design panel next click on the corridor drop down and select corridor
in the create Corridor dialog box specify the following parameters we’re going to give it a brand new name and we’re going to call it corridor Dash transition Lanes
then for the Baseline type we’re going to leave it at alignment and profile
and then for the alignment we’re going to leave it at Center Line
for the profile we’ll switch that to layout
and for assembly we’re going to specify transition the transition assembly includes the basic Lane transition sub-assembly which uses the transition parameter to specify that both the offset and elevation can change on the right side of the corridor the offset can change on the left side of the corridor but the grid is held at negative two percent now for the Target surface we’re going to specify that as the existing grade
and make sure the set Baseline and region parameters is checked after that go ahead and click ok
now we’re going to specify the fixed Lane horizontal Target in the Baseline and region parameters dialog box we’re going to set all Targets
now we’re in the Target mapping dialog box specify the following parameters in the transition alignment row for the right side we’re going to specify an object name the object type that we’re going to Target is alignments and we want to select the right alignment go ahead and click add and then click ok
in the transitional alignment Row for the left side we’re going to do the same thing we’re going to click the object name but we’re going to specify a different object type to Target we’re going to select feature lines survey figures and polylines next go ahead and select from drawing and we’re going to select this blue feature line and this magenta feature line that’s on the left side of the alignment go ahead and press enter
notice that the entities are added to our table
let’s go ahead and click ok notice that because the sub-assembly names contain the assembly side it’s easy to determine which assembly must Target which offset object this naming convention is even more useful in Road designs that contain many alignments and sub-assemblies for information on updating the sub-assembly naming template see modifying the subassembly name template exercise now let’s specify the fixed Lane elevation targets now within the transition profile Row for the right side let’s select object name
we’re going to leave the Target on profiles for the alignment we’re going to switch that to the right side and for the profiles we’re going to specify the layout profile go ahead and click add and then click ok the right side pavement Edge elevation is set to the layout 1 profile the left side edge of pavement elevation does not need to be set since its elevation is determined by the grading setting now we’re going to press OK twice
we do want to rebuild our corridor
the corridor model is now built and looks like this so that’s how you go about creating a corridor with a transition Lane in civil 3D in this exercise you’ll create a fairly complex assembly with a depressed median and separate Lanes so let’s go about creating an assembly Baseline go ahead and open up your corridor-3a drawing which is located in your tutorials folder next go to your home tab and then to your create design panel click the assembly drop down and select create assembly we get our create assembly dialog box we’re going to go ahead and give it a name call it divided Highway
and then click ok now we’re being prompted in the command line to specify assembly baseline location go ahead and click anywhere within the drawing to set this Baseline you’ll see that the viewport zooms to the assembly Baseline which looks like this so let’s go ahead and add a median sub-assembly if the tool palette containing the sub assemblies is not visible go ahead and go up to your home tab and then within pallets click this icon right here within the tool palette right click on the control bar and make sure that you have civil Imperial sub-assemblies checked after that click on the medians tab go over to this sub-assembly median depressed shoulder extension and what I want you to do is right click on this and then select help in here you can review the diagram to better understand the sub-assembly now go ahead and click on the sub-assembly in the properties palette under Advanced we’re going to change a few things
under Center Line pivot change this
to Pivot about Center Line after that we’re going to keep our median widths the same in the drawing go ahead and click on the marker you can see
that we now have a depressed median and the inside shoulders drawn next we’ll add a lane sub-assembly in the drawing pan to the left Edge of the median depressed shoulder extension sub-assembly zoom in so that you can see the marker right here go ahead and click the lanes tab and select Lane super elevation aor
th this sub-assembly inserts a travel Lane that follows the slope for the super elevation properties of the alignment in the properties go ahead and go into your Advanced area for the side we’re going to change this from right to left
and for the width we’re going to assign it 24 feet now in the drawing go ahead and select this marker point
and when we zoom out we see how it fits together nicely now we’re going to add a shoulder sub-assembly and the drawing pan to the left side of the last assembly that you just inserted and in the tool palette click the shoulders tab and select shoulder extend sub Bass go over to your properties panel and under Advanced we’re going to change a few things here as well we’re going to keep it on the left side but for use super elevation slope we’re going to change this
to Left Outside shoulder and everything else we’re going to leave it at its defaults this sets these slopes to the outside shoulder super elevation slope in the drawing select this marker right here which is the marker point at the top outside edge of Lane on the finish grade to add the paved shoulder
we can go ahead and zoom out and pan around
go ahead and press enter again to exit that out of the command now we’re going to add a daylight sub-assembly and the drawing we’re going to zoom into this area right here
now click the daylight tab now right click on the daylight standard sub-assembly
and click help
go ahead and review this diagram
and behavior section to better understand the cut and fill daylighting behaviors in the tool palette go ahead and select daylight standard
in the drawing go ahead and click the marker at the outside edge of the shoulder extends sub bass sub-assembly to add the daylight slopes for cut and fill and you can see how that looks lastly we’re going to mirror the sub-assemblies to the right side of the Baseline press escape to exit the sub-assembly placement mode in the drawing we’re going to zoom out a bit I’m going to turn off my tool palettes here so we can see the entire thing
I’ll go ahead and select the daylight the shoulder
and the lane sub-assemblies then right click and select mirror
zoom in to the right side
and click the marker point at the top edge of the median sub-assembly to draw the mirror of everything else
go ahead and zoom out and you can see how everything appeared very nicely now the mirror command creates a mirror image of the selected sub-assemblies all the sub-assembly parameters are maintained except for the side parameter also note that the parameters of the mirrored sub-assemblies are not dynamically linked if you change a parameter value for a sub-assembly on one side of the assembly Baseline the change will not be applied to the opposite side so that’s how you go about creating a divided highway assembly in civil 3D in this exercise you’ll create a divided highway corridor this exercise continues from creating a divided highway assembly so let’s go about creating a divided highway corridor note that this exercise can use the corridor-3a drawing from the previous exercise or you can open up the corridor-3b drawing from the tutorials folder let’s start by going to the Home tab and then over to the create design panel next click on the corridor drop down and select corridor
we get the create Corridor dialog box let’s go ahead and give it a name we’ll call it divided
Highway
we’ll keep everything at its defaults except for the profile we’re going to change this to our layout and then for the assembly we’re going to choose the divided highway that we just created for the Target surface we’re going to select the existing grade and then for the set Baseline and region parameters we’re going to clear this box when the set Baseline and region parameters box is cleared the default Corridor creation settings are applied to the corridor go ahead and click ok
you’ll see that the corridor model is now built and it looks something like this so that’s how you go about creating a divided highway Corridor in civil 3D in this exercise you’ll view how a corridor assembly is assembled at various stations along a baseline alignment The View edit Corridor section tools are useful for inspecting how the corridor assemblies interact with other objects in the corridor model so let’s go ahead and view a corridor section go ahead and open up your corridor-4a drawing which is located in your tutorials folder the drawing contains an assembly as you can see right here a profile view and a corridor model each object is displayed in a separate viewport the viewport that contains the assembly is now active we’ll start by clicking on the corridor
then go into the modify Corridor sections panel and select section editor on the section editor tab go ahead and select a station by clicking this drop down and going to the very first station zero you’ll see that a cross section of the corridor at the starting station is displayed the elevations and offsets are displayed on the grid axes the cross section view contains the assembly as well as the other adjacent objects at the current station the offset alignments are represented by a vertical green line as you can see right here and the existing surface is represented by the horizontal Red Line the vertical red line at the center of the grid represents the assembly Baseline profile intersections with the Baseline are indicated with this little marker right here this magenta Circle you can use the tools within the section editor tab to view the corridor sections at each Corridor station go ahead and click forwards
and backwards
you’ll notice that as I click
you’ll see a line showing where we are currently within our section in fact let’s highlight this viewport and we’ll go into our corridor and you can see this line here as well so continue to move through the Section and you can see both lines move along with each station
let’s experiment with the zoom modes go ahead and zoom in to the lane on the right side of the assembly
then go ahead and select this button to go to the next station within the assembly
notice that the view zooms back out to the grid extents there are three Zoom modes in the view edit Corridor section tools these modes control the behavior of the grid when you navigate to another station in the select station list go ahead and navigate to station three
then within the zoom tools panel go ahead and click this drop down and select Zoom to sub-assembly now we have the pick sub-assembly dialog box go ahead and select this drop down and select daylight right and click ok
The View Zooms in to the daylight right sub assembly at station three notice the shape elevation and offset of the sub-assembly go ahead and go back to the station list
and go down to Station 9. The View Zooms in to the daylight right sub assembly at station 9. notice that the shape elevation and offset of the sub-assembly it’s quite different from station three The sub-assembly Remains at the center of the grid and at the same Zoom Factor as you navigate to other stations go ahead and go back to your view tools panel select this drop down again then select Zoom to an offset and elevation
then click go to the next station a few times
notice that the offset and elevation values that are displayed on the grid do not change the shape of the daylight and right subassembly changes to reflect how it ties into the existing ground surface lastly go ahead and select Zoom to extents then select go to the next station you’ll see that the view backs out to the extents of the assembly so that’s how you go about viewing Corridor sections in civil 3D in this exercise you’ll edit the parameters at several corridors sections you’ll edit a section in two ways first you’ll modify a sub-assembly parameter at a single station which will override the sub-assembly settings for that station only second you’ll modify a sub-assembly parameter and then apply the modification to a range of stations this exercise continues from viewing chord or sections so let’s go ahead and modify sub-assembly properties for a single station note that this exercise uses the corridor-4a drawing from the previous exercise we’ll start off by panning over to our corridor in our top view and then going over to our modify Corridor sections panel select section editor and then we get our grid go ahead and navigate to
station Seven five next within the zoom 2 we’re going to zoom to a sub assembly
and we’re going to select Lane right then click ok once we get this view go ahead and select parameter editor then pops up our editor we’ll move this off to the side within the corridor parameters dialog box we have our assembly dash one tree and then we have several groups if we collapse these down we can see things a little bit better
what we want to focus on is Lane right go ahead and expand that you’ll notice that identical values show up within these two columns the design value and the value column the design value column displays the value that was specified when the sub-assembly was added to the assembly the value column displays the actual value of the sub-assembly at the current station in the following steps you’ll override the design value at the current station and then examine the results go ahead and scroll down until you get to the width value it’s currently set to 12. we’re going to change it to 36.
then press enter notice that the override check box is now set to true which indicates that the design value has been overridden at this station go ahead and go forward a few stations and watch this particular area right here that we just changed
you’ll notice that it goes back to 12 feet
so the lane sub-assembly that’s displayed in the section view updates in width to reflect the width at the current station let’s go back to 775.
see how we’re right back to 36. what we’ll do is we’ll go ahead and click this check box and clear it so it’s back to false and we’re back to 12 feet now we’ll modify sub-assembly properties for a range of stations go ahead and go into your view tools panel and then click this drop down and select Zoom to extents next within the select a station panel click the drop down and select station 450.
notice that the road is in a shallow cut on one side and a deep cut on the other the criteria is set for the daylight sub-assembly caused it to use a certain slope on the left and a certain slope for the right also notice the super elevation transition of the road at station 450 the lanes are relatively flat go ahead and go into your station selection and select 775
notice the super elevation transition using the center line pivot option on a depressed median subassembly causes the lanes and the shoulders to Super Elevate about a point above the center line ditch a straight edge laid against the lane surfaces would pass through the profile grade point go ahead and select the parameter editor under assembly one go ahead and expand the median and you’ll see the center line pivot you can see
under the design value and the value itself you have one that says pivot about a center line what we’re going to do is we’re going to select within the value column and select pivot about an inside edge of Road of traveled way on the corridor edit tools panel select apply to a station range
in the apply to a range of stations dialog box notice that the start station is at 7.75 which is the current station for the end station enter in 11.
then click ok
now go back in the corridor edit tools panel and select update corridor now go ahead and go from station 775 up to 11. and you can see how the Center Line pivot override is currently checked
see how it’s still checked off now we’re at 11. now if I select the next station you’ll see it uncheck
there we go we’ll go all the way to 11.75 and you’ll see that this override check is cleared so that’s how you go about editing Corridor sections in civil 3D
