I am using QGIS 3.6.2, I have a vector layer with thousands of vector lines on it. I don't know if this is possible but I want to see if these vector lines merge at all. To be more specific I have trails that I want to see if they merge to one or few points to cross roads. Is there a plugin I can use or a method to find this out?


you can make a vector grid (Vector-> Create Grid), e.g. 100 or 50 meters and then to count the lines per cell with the processing tool "Sum Line length" which also counts the lines per cell.

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    Well done, this is an excellent answer. I have a small suggestion to improve the efficiency of this analysis (which might be slow if you have a lot of grid cells). First use select by location to select the grid cells that intersect trail lines. Run the sum line length tool on selected features only. – csk May 9 at 17:36

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