[OSM-talk] Render icons for parking areas

[Sebastian Spaeth]

matthew-osm at newtoncomputing.co.uk wrote:
> Personally, my ideal is to:
> 
>  - tag all parking areas with an area
>  - tag only public car parks with a node
> 
> This means that you can easily see the places you can park
> your car because of the car park symbol, but the
> "private"[1] car parks for residents in housing estates,
> etc, are not marked out so prominently.

Why is this not best be done with access=public/private/... ?