Proposed features/Roundabout Priority
|Definition:||Indicates that traffic entering the roundabout has priority|
|Rendered as:||As junction=roundabout|
The proposal is that a new standardised way be defined to indicate that a roundabout uses an alternative priority arrangement.
On a roundabout, the normal situation is that traffic which is already on the roundabout has priority over traffic wishing to enter the roundabout. In certain countries some (or all?) roundabouts use a different scheme, whereby traffic entering the roundabout has priority over the traffic already on the roundabout. This proposal is for a tag to indicate this difference.
The distinction could be of importance for navigation devices which could wish to visualise/verbalise these roundabouts differently.
I have only encountered this type of roundabout in mainland Europe, where "priority to the right" is a common concept at junctions between similarly classified roads in the absence of explicit priority markings.
In the Netherlands these roundabouts are traditionally called "verkeersplein" (a normal roundabout is a "rotonde").
The proposal is for these types of roundabout to be tagged "junction=roundabout+roundabout=priority_to_right" in right-driving countries. The value "priority_to_left" can be utilised as a mirror-image tag for use in countries where traffic drives on the left and is not intended for use in right-driving countries.
For an aerial photo of a bad example, click here. By coincidence this is the roundabout near my home which set me thinking about all this! I am sure it used to be a good example, but it may have changed when the road was reconstructed a year or so back. These days there are give way lines as you enter the roundabout which I guess I never noticed because the traffic lights are always working.
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