Intersection Wizard--Curb Return

[raunelortiz659677]

I was trying to use the intersection wizard to make a T intersection. I made my alignment and then cut a profile, made a proposed profile for roadway (profile by layout), for both roads then I used intersection wizard. Everything seemed to be fine except for my curbs at the intersection go down to elevation zero. I suspect it was my curb returns, I tried to see what it was targeting and it is showing to be targeting some profile That cad generated. Is there a way to Change this or fix this?

P.S. I have made these intersections with feature lines before but it is time consuming.

[mjfarrell]

Make your own curb return alignments and profiles, or verify that the C3D created profiles that it used are as long as the parent alignment that created them.

In the long run you will be hapier creating your own alignments and profiles, because then you will know EXACTLY what data was used and why they behave the way they do.

[raunelortiz659677]

Yes but this takes more time. I have ended up creating the entire intersection but it much more time to do this. I am trying to be more efficient in using the autocad intersection wizard to create these for me.

[mjfarrell]

Yes but this takes more time. I have ended up creating the entire intersection but it much more time to do this. I am trying to be more efficient in using the autocad intersection wizard to create these for me.


I would suggest you send me a copy of the file with the bad intersection in it so that I can analyze what went wrong with the work the wizard did for you.

The question I would pose:

What value is the accuracy of your design?

The next question would be; would you be interested in seeing a method to help create you intersection designs much more efficiently?

[raunelortiz659677]

I have deleted that intersection but will be starting a new one within the next day so i can send you that one and show you my issues.

I guess I don't understand your question
'What value is the acuracy of your design?'
I guess if your asking if the model should be be accurate then yes because we will be grading from the back of curb a sidewalk that will lead to a parking garage and a building. Elevations should be accurate for this purpose as well as to build from.

On your second question, I am open to suggestions for any method that would help create intersection designs more efficiently.

[mitchblyth215344]

I'm in the same boat as raunelortiz. I've created a T intersection using the wizard. All profiles and alignments are fine and at the right level. When i create the intersection and check it in object viewer the adjoining roads are fine except half of my intersection corridors are at 0. This obviously throws out all the daylighting. I've recreated existing surface, recreated assemblies, used the standard assemblies, set target surfaces again and again. Nothing works. It's wierd because the alignments are correct and i thought the wizard is run from the relationship between the alignments.
I have no answers currently!

[mitchblyth215344]

I'd also like to see a method to help create intersection designs much more efficiently!
Cheers MJ.

[mjfarrell]

I'd also like to see a method to help create intersection designs much more efficiently!
Cheers MJ.

I think the MOST efficient method is the one I teach. In this instance we Ignore the wizard entirely, and enlist the aide of a DUMMY corridor to solve some of the design challenges for th curb levels.
Then our intersections function as we want them to, and we aren't left trying to determine where the Wizard went off the rails.

Cheers Mitch! Can I see your dodgy file?

[bruce.klug]

Are you using 3 alignments or just 2 for the "T" intersection? I had a problem trying to use 3 coming together at one point. It works best to only have 2 alignments.

Bruce

[mjfarrell]

Are you using 3 alignments or just 2 for the "T" intersection? I had a problem trying to use 3 coming together at one point. It works best to only have 2 alignments.

Bruce

Not that it matters; why would there be THREE (3) alignments involved at a "T" intersction?

[bruce.klug]

Our survey department always starts each alignment at 10+00 going AWAY from the intersection:cry: This is a problem with the 4 way intersection also. I have to join the alignments and reverse the direction so I end up with only 2 alignments that meet at the intersection.

Bruce

[mjfarrell]

Our survey department always starts each alignment at 10+00 going AWAY from the intersection:cry: This is a problem with the 4 way intersection also. I have to join the alignments and reverse the direction so I end up with only 2 alignments that meet at the intersection.

Bruce

Just asking; why not have a design centerline, in your DESIGN file(s) that is contiinous (normal)
And then let the Surveyors have their own alignments that do whatever they think they need to do with them, in a SURVEY file, or on Survey Layers?

I wont ask you to explain why, because I'm sure someone has gone to a lot of work to justify doing them that way. And they certainly wont change just becuase someone asks them to.

I've been in this business since 1978, and have never worked anywhere that wanted to treat alignments in that manner. And if you think about it logically they can not ALL start at Ten plus Zero Zero and go away from an intersection. Like what happens from block to block? Somewhere in the middle does it start counting down to 10+00 again?