When working on complex junctions, tunnels, train tracks, and pedestrians, and when all of them are in the same area, the map becomes a real mess and is hard to work with. I suggest adding additional layers to toggle off the visibility of road types and a layer to hide tunnels (or change their transparency at least and make them unselectable and disable snapping).

Take a look at this picture, and you'll immediately understand the issue.
https://i.ibb.co/NFs8jQx/image.png