[Test Case]: Alignment Superelevation & Width

[AlexBrad1eyCT]

Test Case Purpose

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Test case covering the export of superelevation and width transition data mounted on a road alignment.

Scope Summary

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Alignment Curve definition imported from previous test case annotated with:

• Various superelevation definitions
  • left
  • right
  • both
• Various Width transition
  • left
  • right
  • both

Test Case Proposal

MVD Code: IFC4x3_AbRV
Exchange Code: E1a
Name: Alignment Superelevation & Width
Test Code: ALSE

Additional context

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Miro Dependence Card

[ccast1]

Most of the case, the superelevation is not calculated on the alignement. this case is only for the case of a roof profile. On a double carriageway, the alignment is on the "central reserve" or "medium". the rotation center is calculated from the edge of pavement ( on the left in case of green field, on the right, in case of extension by the right side) . This case is not exactly the "cant" case, but very similar

[larswik]

The IfcAnnotation PDTs SUPERELEVATIONEVENT and WIDTHEVENT are there to describe nominal values and not geometry. To describe geometries one can use e.g. sectioned solids/surfaces (swept along alignment curves), TINs etc. It would for example be possible to specify an alignment and a lateral spatial structure that captures the structure of the whole road reserve including a dual carriageway and the central reserve and specify superelevation and width for the carriageways and e.g. the central reserve width by using these annotations and spatial containment. Linear placement for superelevation and width would specify where along the referenced alignment these nominal values begin.

[ccast1]

@larswik : ok , with your first remark on geometry. The point is the case when the superelevation is calculated or applied on a string representing the edge of pavement layer. It means the red line for the vertical is applied on this string ( the elevation reference) but the geometry of the horizontal alignment is applied on another one string on the central reserve. Just say me if my question is clear enough, may be I'm totally wrong. Anyway, if "cant" is supported, this case it's just one case of the "cant" case, but for the road.