https:\/\/players.brightcove.net\/6161463677001\/default_default\/index.html?videoId=6317662924112
OSM has a "layer" tag, which indicates the effective level of the roadway. You should be able to use that to inform your splitting function.
When you run Feature To Line you effectively break the drivability of the network by forcing junctions and bridges, overpasses, etc. This allows drivers to "turn" off a bridge or overpass onto the road below and dropping/crashing. Do you know of any way around this? Create a network from OSM but retain roads that cross over other roads (preventing turns at cross-over)?
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