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crossing: Add readme for crossing presets and fields
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# About the crossing presets | ||
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## General | ||
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These presets use fields `@templates` to make sure all have a similar structure. | ||
Some presets like `traffic_signals` have additinal fields and use a different field order. | ||
Try to keep the file structure very similar so they can be easily compared. | ||
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## nodes `highway=crossing + crossing=*` | ||
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Crossing nodes are handel by `highway/crossing.json` + `highway/crossing/*.json` (as geometry type `vertex`). | ||
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Crossing nodes and crossing ways have a big overlap. | ||
However, there are a few tags that should _only_ be expected on the crossing node. When crossing ways are present, this also means there are separate ways attached with additional nodes that hald the | ||
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There are places in OSM that follow a different tagging style where only crossing ways are used (without the vertex nodes). Those regions might have other conventions on where to place | ||
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## ways `highway=footway|cycleway|path + *=crossing + crossing=*` | ||
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Crossing way presets are duplicated per highway class: | ||
- `/highway/footway/crossing.json` + `/highway/footway/crossing/*.json` | ||
- `/highway/cycleway/crossing.json` + `/highway/cycleway/crossing/*.json` | ||
- `/highway/path/crossing.json` + `/highway/path/crossing/*.json` | ||
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The crossing presets for `/cycleway*` and `/path*` are considered to be relevant for bike traffic and have additional fields that target bike vs. foot traffic. |