Tag:placement=transition

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Public-images-osm logo.svg placement = transition
Placement Transition.jpeg
Description
Used to indicate that the OSM-way is neither in the middle of the whole road nor does it run parallel to some lane. Edit or translate this description.
Group: Properties
Used on these elements
should not be used on nodesmay be used on waysshould not be used on areasshould not be used on relations
Useful combination
Wikidata
Status: proposed

The proposed tag placement=transition can be used to indicate that the OSM-way is neither in the middle of the whole road nor that it runs parallel to some lane. This value is usually only necessary if the road forks or joins with another one.

Tagging

Example 1. Left exit shown, right exit would be mirrored.

A good example would be a freeway exit. Start the way segment that is in transition where it departs from the highway at the painted gore, end it at the start of the physical separation. This is visualized in JOSM as the selected (red) segment in Example 1. This may result in a steep angle: This is definitely a compromise between aesthetic consideration and what data consumers need to provide road users with navigation that accurately reflects decision points.

Original Proposal

See the proposal for details.