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*Lane discretization* is associated with the distribution density of [lane-load points|kb:Lane-load point]. The [influence surface|kb:Influence surface] is then interpolated from this parameter. During [lane|kb:Lane] definition, lane discretization is specified along and across the lane.


h1. Mesh vs. Auto-mesh influence on lane discretization

[Auto-meshing|kb:Discretization] structural objects which are located within the lane footprint may create additional lane-discretization points because of discretizationthe logic which generates discretization, described whichas follows:

# Place lane-discretization points where the lane centerline intersects an edge of each [area|kb:Shell], [solid|kb:Solid], and line object ([frames|kb:Frame], [cables|kb:Cable], [tendons|kb:Tendon], [links|kb:Link]).
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# Meet the specified lane-discretization density by adding discretization points, if necessary.

This process is consistent with the instruction on the Lane Definition menu, which states that _maximum_ discretization length is specified.


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*Related email:*
* {email:date=1/6/2011|from=sp|to=bm|subject=Auto meshing and lane discretization|comment=Explanation of how auto meshing affects discretization|id=6357781}
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h1. What values optimize accuracy and efficiency for Maximum Lane Load Discretization Length along and across the lane?

[Discretization|kb:Discretization] on the order of ^1^/~10~ span length and ^1^/~2~ lane width is typically sufficient for overall superstructure and substructure behavior. Finer discretization may be necessary to capture certain local effects. Since influence analysis can be time-consuming, we recommend using the largest discretization size possible, especially during preliminary analyses, then possibly refining the discretization for final results. To graphically show and evaluate discretization, it may be useful to plot the influence lines for a few representative quantities.