Combine lines like merge them as well as summing thier field value.

[dhruvparmarca]

I am trying to combine value of field of overlapping lines in a feature class. 

I have several lines, some are overlapping each has flow rate of different values. I want to combine those lines. 

For example, 

----------------------------------       (Value 3)

-----------                                    (Value 4)

_______..............................       

(3+4)               4                 

[DavidPike]

make sure you make a copy of your data first, as this will edit the existing dataset.

Planarize lines should be run to split the segments at overlaps Planarize polyline features—ArcGIS Pro | Documentation

Then use a spatial join to get all overlapping attributes (target = planarized copy, join features = original data, Match option = 'Within' (I think, or contains, I get confused - see what happens!)) - Spatial Join’s hidden trick on how to transfer att... - Esri Community