I am on the project to identify the specific roads that are more frequently used than others. With the network shapefiles (OS ITN), origins and destinations (OD) points, route was created for each set of OD (Closest facility tool). What I want to do next is to identify the roads that are used for more than one routes; for instance, assuming that there are 5 people, each of them departs from different point (origin) to get to the point A (destination), but there are some roads that all of them need to use along the way. In other words, I want to extract the lines that "overlapped". As an experiment, I created 3 routes separately and tried to extract overlapped features using overlay tool - intersect - but it didn't work. I tried converting it to Raster and did "Overlay sum" but didn't work.
If anyone can suggest the way to solve my problem, that would be really helpful.