Lane trasition with curves

[fishautodesk124]

My current dwg file shows a roadway with a centerline and 12’ travel way and an 8’ shoulder on the left and right side.

What I would like is a 500’ lane and shoulder transition from the beginning of the alignment to the end station which would be the full lane width of 12’ travel way and 8’ shoulder and the beginning station will have a travel way width of 11’ and shoulder 4’ which is the existing.

I have tried using the lane transition assemblies but they don’t work to well and tried many options but was unable to get this to work.

Can someone create for me a screen cast how to accomplish this just show me just showing me the right side of the road. Once I know how to do one side I will be able to do the other side.

Thanks

[sboon]

Use offset alignments for this.  In this example I have one on each side, controlling the shoulder width.  Both of them start off with a default offset, then have a zero length transition inward, to match the existing pavement widths at the start of my corridor. 

On the right side I have a fairly short length using existing width, then a transition highlighted in green to the design shoulder width.  On the left I have a longer section on the existing width, then a series of transitions to form a shoulder flare for roadside barriers, ending with the design width.

In your case I would use two offset alignments on each side to handle the lane and shoulder widths.  Before creating them make sure that your settings for transition around curves are appropriate.  If the number of segments is too small then your transitions will be jagged.

[fishautodesk124]

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@sboon wrote:

Use offset alignments for this.  In this example I have one on each side, controlling the shoulder width.  Both of them start off with a default offset, then have a zero length transition inward, to match the existing pavement widths at the start of my corridor. 

On the right side I have a fairly short length using existing width, then a transition highlighted in green to the design shoulder width.  On the left I have a longer section on the existing width, then a series of transitions to form a shoulder flare for roadside barriers, ending with the design width.

In your case I would use two offset alignments on each side to handle the lane and shoulder widths.  Before creating them make sure that your settings for transition around curves are appropriate.  If the number of segments is too small then your transitions will be jagged.

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Hello,

After trying your suggestions for a couple of hours I can't get it to work. I am ready to give up.

Can you please provide me a screen cast of how you do this.

Thanks

[sboon]

As requested.

I've attached the drawing I used, at the start and end of the video.  If you open the final version you will be able to add the left side alignments as offset targets in the corridor, and you can make changes to the offset alignments, taper lengths etc.

Steve
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