As the video shows: I discovered that the European Pedestrian Bridge from the Bridges & Piers CCP completely ignores collision meshes when being placed at 4 Elv. steps/12 metres. It can literally be drawn directly on top of other networks.

Also shown is an example from my latest (vanilla console) city where I use this bridge to cross an otherwise impossible gap across a major arterial and waterway, with the bridge supports intersecting fully with the networks below. Without mods, this bridge would be impossible with every other bridge type.