AutoCAD Civil 3D General Discussion

AutoCAD Civil 3D General Discussion

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*neilw
Message 1 of 8 (275 Views)

Corridor: Curb Returns

275 Views, 7 Replies
02-27-2009 09:17 AM
In the attached screen cap there are 2 curb returns that intersect my
corridor at slightly different stations. To model this properly do I need to
create seperate assemblies and regions for the left and right lanes? I
suppose I could stop the 2 lanes at the closest of the 2 the returns and add
the small segment on the opposite side to the curb return region, but that
small segment will no longer be getting it's elevations from the main
roadway. In this case it is insignificant but in other scenarios it may not
be the case. This scenario seems to create a lot of tedious work. I'm
looking for efficient options.
*wfb
Message 2 of 8 (275 Views)

Re: Corridor: Curb Returns

02-27-2009 10:01 AM in reply to: *neilw
Neil:

Even if the regions do not connect directly I thought that the model would
connect itself.

Bill

"neilw" wrote in message
news:6133275@discussion.autodesk.com...
In the attached screen cap there are 2 curb returns that intersect my
corridor at slightly different stations. To model this properly do I need to
create seperate assemblies and regions for the left and right lanes? I
suppose I could stop the 2 lanes at the closest of the 2 the returns and add
the small segment on the opposite side to the curb return region, but that
small segment will no longer be getting it's elevations from the main
roadway. In this case it is insignificant but in other scenarios it may not
be the case. This scenario seems to create a lot of tedious work. I'm
looking for efficient options.
*neilw
Message 3 of 8 (275 Views)

Re: Corridor: Curb Returns

02-27-2009 10:21 AM in reply to: *neilw
Are you saying that I can leave a gap and let the surface triangulate
across?

"wfb" wrote in message
news:6133328@discussion.autodesk.com...
Neil:

Even if the regions do not connect directly I thought that the model would
connect itself.

Bill

"neilw" wrote in message
news:6133275@discussion.autodesk.com...
In the attached screen cap there are 2 curb returns that intersect my
corridor at slightly different stations. To model this properly do I need to
create seperate assemblies and regions for the left and right lanes? I
suppose I could stop the 2 lanes at the closest of the 2 the returns and add
the small segment on the opposite side to the curb return region, but that
small segment will no longer be getting it's elevations from the main
roadway. In this case it is insignificant but in other scenarios it may not
be the case. This scenario seems to create a lot of tedious work. I'm
looking for efficient options.
Valued Mentor
ccoles
Posts: 329
Registered: ‎06-26-2007
Message 4 of 8 (275 Views)

Re: Corridor: Curb Returns

02-27-2009 10:31 AM in reply to: *neilw
> {quote:title=Guest wrote:}{quote}
> Are you saying that I can leave a gap and let the surface triangulate
> across?
>
> "wfb" wrote in message
> news:6133328@discussion.autodesk.com...
> Neil:
>

I believe that is what he is saying. I've done it myself in some projects.
Windows 7 64-bit
Dell Precision T5610, Dual-Xeon 2.6Ghz, 16 Gig RAM
Civil 3D 2013
*neilw
Message 5 of 8 (275 Views)

Re: Corridor: Curb Returns

02-27-2009 10:43 AM in reply to: *neilw

In a case where the gap is larger that may not be
an acceptable solution. Would we then have to resort to seperate assemblies and
regions? I'm in an evaluation mode here so I'm trying to anticipate workflows.
On this simple road project I'm finding it is taking way to much work to model
this corridor.

 


style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
>
{quote:title=Guest wrote:}{quote} > Are you saying that I can leave a gap
and let the surface triangulate > across? > > "wfb"
wrote in message >
news:6133328@discussion.autodesk.com... > Neil: > I believe that is what
he is saying. I've done it myself in some projects.
*Jeff Mishler
Message 6 of 8 (275 Views)

Re: Corridor: Curb Returns

02-27-2009 10:44 AM in reply to: *neilw
FWIW, I use the "Add the missing section of alignment to the curb return
defintion" method. No, it's not dynamic to the main alignment, but when the
alignment changes the CR's need to be revised anyway. For smooth transitions
I will usually make the CR alignments 20' long at each end (following the
street alignments) which makes this a fairly simple task.

"neilw" wrote in message
news:6133347@discussion.autodesk.com...
Are you saying that I can leave a gap and let the surface triangulate
across?

"wfb" wrote in message
news:6133328@discussion.autodesk.com...
Neil:

Even if the regions do not connect directly I thought that the model would
connect itself.

Bill

"neilw" wrote in message
news:6133275@discussion.autodesk.com...
In the attached screen cap there are 2 curb returns that intersect my
corridor at slightly different stations. To model this properly do I need to
create seperate assemblies and regions for the left and right lanes? I
suppose I could stop the 2 lanes at the closest of the 2 the returns and add
the small segment on the opposite side to the curb return region, but that
small segment will no longer be getting it's elevations from the main
roadway. In this case it is insignificant but in other scenarios it may not
be the case. This scenario seems to create a lot of tedious work. I'm
looking for efficient options.
Valued Mentor
ccoles
Posts: 329
Registered: ‎06-26-2007
Message 7 of 8 (275 Views)

Re: Corridor: Curb Returns

02-27-2009 10:49 AM in reply to: *neilw
I have left some gaps as large as my sampling interval with no problems. On straightaways, this is usually 25-ft, although I have used 50-ft on occasion.
Windows 7 64-bit
Dell Precision T5610, Dual-Xeon 2.6Ghz, 16 Gig RAM
Civil 3D 2013
*neilw
Message 8 of 8 (275 Views)

Re: Corridor: Curb Returns

02-27-2009 10:55 AM in reply to: *neilw
>I use the "Add the missing section of alignment to the curb return
defintion" method.

I've never heard of this. Can you explain a bit more Jeff?

With larger gaps we lose daylighting and have gaps in rendering among other
issues.
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