[OSM-talk] Highway = Motorway automatically oneway ?

[Dermot McNally]

On 14/10/2007, Abigail Brady <morwen at evilmagic.org> wrote:

> Any competently written tool will assume oneway=yes on motorways, if only
> because of the vast quantities of data that does that.

I think we need to be careful what we infer in cases like this
(especially if we infer it without telling anybody). While I can't
think of any current stretches of motorway that are 2-way, Germany as
one example is full of 2-way stretches of motorway_link, as here:

http://www.informationfreeway.org/?lat=48.19084402854966&lon=11.704346359824747&zoom=16&layers=0B00F000

>From what I can see, osmarender is inferring oneway=yes on the
motorway_link sections, even though only the parts explicitly tagged
with the property are thus tagged.

I've never been that comfortable with the assumed-one-way status even
on roundabouts (where I've yet to see an exception), but I'm fairly
opposed to it in this instance (at least for motorway_link).

Dermot