Calculate Route Concurrencies Dominant Error type 4

[MichaelClement]

We have a few routes in our network that are returning error code 4 from the Calculate Route Concurrencies tool which is says " One of two conditions are present in the concurrent section: the route is not calibrated in the concurrent section or the centerline that composes the concurrent section doesn't align with the geometry of the route."  

Has anyone ran into this issue and can anyone provide any ideas of what to look for to fix the issue?  

The route in question acts like it is calibrated in every other way we can test it. We can get valid measures using the Identify LRS Route Location tool.

I checked the route geometry against the centerline geometry that makes up the route using the Symmetrical Difference tool and it didn't find any differences.

[NathanEasley]

Hi Michael,

You're correct that the error code 4 is related to the route either not being calibrated in a portion or not aligning with the centerline.  I have a few suggestions below to take a closer look at the routes in the concurrent section to determine if either of these conditions are present.

To determine if there is any portion of any of the routes in the concurrent section that don't have calibration you can do the following: Use the routes tab in the layer properties to turn on the symbology to show routes that have unpopulated (NaN) M values at any location (http://desktop.arcgis.com/en/arcmap/latest/manage-data/linear-referencing/displaying-route-measure-a...) or you can look for M values that are NaN for each of the routes that are concurrent using the Sketch Properties (http://desktop.arcgis.com/en/arcmap/latest/extensions/3d-analyst/using-the-edit-sketch-properties-wi...).

If you don't see any NaN values in any of the concurrent routes, you'll need to look at the centerlines that compose the concurrent routes to ensure they're geometries are shared.  You can do this by using the Select by Location tool (http://desktop.arcgis.com/en/arcmap/latest/map/working-with-layers/using-select-by-location.htm) or by manually inspecting the features to ensure they're sharing the same shape (you'll need to by very closely zoomed in since the centerline and route being more than the XY tolerance apart will trigger this error code 4).

If everything looks as expected after looking at these routes, I would encourage you to log a support case and work with an analyst to further investigate what caused this error code to appear.

Nathan

Esri Roads and Highways Product Team