I need to calculate the total length of paths within each 1km square grid (created with the Fishnet tool). The total length will then be used to rank each grid, depending on the total length distance inside.
I have already used the Intersect tool to ensure the paths do not go through any of the grid borders.
How do I now combine the separate lengths within each grid? See example dataset below. I would like it to show:
Fishnet ID :1
(I am using ArcMap 10.4.1)