|Traffic priority for narrow parts of roads, e.g. narrow bridges.|
|Used on these elements|
|Status: in use|
|Tools for this tag|
Single lane traffic direction priority
Where traffic is narrowed to a single lane due to an obstacle such as a narrow bridge or a traffic calming measure there is sometimes a sign either side of the restriction indicating that one direction of traffic has priority over the other. These signs are registered in theas these:
|Priority over oncoming traffic (B6)||Priority for oncoming traffic (B5)|
It is useful to record this information in OpenStreetMap so that routing algorithms could take account of it in determining the delay based on travel direction.
- Use priority=forward for priority in the same direction as a way's ordered set of nodes.
- Use priority=backward for priority in the opposite direction to a way's ordered set of nodes.
- priority_road=* - Signposted priority roads