It is sufficient to just map the [`lanes`][1] of the road. Mapped lanes implicitly contain forks. Example using your picture (I've reversed the car's driving direction with my incredible paint skills ;)): ![example image][2] Also consider mapping `turn:lanes`. The wiki page about [`lanes`][3] is really helpful and has nice examples. [1]: https://wiki.openstreetmap.org/wiki/Lanes [2]: https://help.openstreetmap.org/upfiles/merging-video-teaser.jpg https://help.openstreetmap.org/upfiles/merging-video-teaser_PtUPgPZ.jpg [3]: https://wiki.openstreetmap.org/wiki/Lanes

It is sufficient to just map the [`lanes`][1] of the road. Mapped lanes implicitly contain forks. Example using your picture (I've reversed the car's driving direction with my incredible paint skills ;)): ![example image][2] Also consider mapping `turn:lanes`. The wiki page about [`lanes`][3] is really helpful and has nice examples. [1]: https://wiki.openstreetmap.org/wiki/Lanes [2]: https://help.openstreetmap.org/upfiles/merging-video-teaser.jpg [3]: https://wiki.openstreetmap.org/wiki/Lanes