Combine route geometries in gtfs graph by color

[gammapopolam]

In various work scenarios, it is best to combine routes according to a certain feature so that the final map is less loaded with thematic content. I tried to manually combine the bus routes in the gtfs graph using python, and basically it works (but with some warnings). Maybe in the next updates there will be the possibility of combining routes by color in gtfs? This would be very helpful when visualizing a route network with a large number of routes.