Superelevation Runout Length incorrect using Austroads Design Criteria File?

[RDunkley]

When Calculating the Super for a Curve using the "_Austroads_Desirable Min Radius Tables_ANZ_2009.xml" I am not getting the results I would expect for the Runout Length...

The Runout Length for both the Transition In and Out is equal to {t} Which from the .xml for an 80km/h road = 55.0m. From what I understand, the Runout Length should actually equal ({t}-Runoff). I am hesitant to alter the Design Criteria File, as it is probably something I am doing wrong, as I can't find much about this on the forums...

Any assistance would be greatly appreciated.

Regards.
Ross.

[andrewpuller3811]

Yes, the "_Austroads_Desirable Min Radius Tables_ANZ_2009.xml" is not correct.

2015 comes with the file "_Austroads Min Radius Tables_ANZ_2010.xml" which is correct as far as I am aware, and also contains both the desirable minimum and absolute minimum radius information.

[RDunkley]

Thanks Andrew,

Do you know what was incorrect? I was wondering whether the Transition Formula's used are the correct ones for Australia..?

Is {t} supposed to be equal to the Austroads Design Superelevation Development Length (Le)?

For example, I would have thought that the formula for "NCtoLC" should be "{t}*{c}/({c}+{e})" not the ones shown below?

From "_Austroads_Desirable Min Radius Tables_ANZ_2009.xml"

<SuperelevationAttainmentMethodname="AUSTROADS - Standard - Enter % in Civil 3D Wizard">

<TransitionStyleStandard>

<TransitionFormulatype="NCtoLC"formula="{t}*{c}/{e}"/>  

<TransitionFormulatype="LCtoRC"formula="{t}*{c}/{e}"/>

<TransitionFormulatype="LCtoFS"formula="{t}"/>

<TransitionFormulatype="LCtoBC"formula="{t}*{p}"/>

<TransitionFormulatype="NStoNC"formula="{t}*({s}-{c})/{e}"/>

Regards.

Ross.

[lim.wendy]

Hi Ross,

Hope the below helps:

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[lim.wendy]

Hi Ross,

Good day to you
Thank you for submitting your question in our discussion forums. Just wanted to check with you for an
update on this issue. Please let me know if you require further assistance.
Your understanding and support is greatly appreciated.
Have a great day!

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