Proposal:Oneway type

Proposal

The proposal is to introduce a oneway_type=*-key.

Reason for this proposal is that one can not distinguish different types oneway.

This is helpful for:

Rendering one-way arrows only on true one-way streets to reduce map noise
Finding true one-way streets to survey for bicycle exceptions (oneway:bicycle=*).

Value	Photo	Description
`oneway_type=oneway_street`	photo?	Normal oneway-roads (often residential), sometimes with more than one lane for the same direction.
`oneway_type=no_entry`	photo?	A few two way roads have a no-entry sign . This is often mapped as a short part of the road with oneway=yes. (DE:Unechte Einbahnstraße)
`oneway_type=separate_directions` or `oneway_type=separate_carriageways`	photo?	Roads with separated carriageways for each direction. Example: motorway-like roads. But a combination of `highway=motorway` and `oneway=yes` should implies this value, because the predominant of motorways (97.22%) has separate carriageways. So motorways don't need an extra oneway_type=separate_carriageway.
`oneway_type=road_divider`	photo?	Short splitted roads, often at junction or at traffic islands (if they don't tagged as a node).
`oneway_type=link`	photo?	*_link roads.
`oneway_type=service_road`	photo?	Service/access roads. Example: access to underground parking.

Do we need the same for junction=roundabout who is oneway=yes is implemented in it?
Do we need oneway_type=cycleway to be able to select all oneway=* at cycleways, even if they tagged as highway=cycleway, highway=path, highway=footway or something else?

The tag should be applied to all roads with contains oneway=*.

Feel free to correct/complete the proposal and let us know better names for the tag value. Please comment on the discussion page.