[Tagging] trees and waterways

[Nathan Edgars II]

On Sun, Sep 12, 2010 at 3:09 PM, John F. Eldredge <john at jfeldredge.com> wrote:
> Tagging oneway=yes on a motorway is an example of tagging a special case.  The general assumption on roads is that they are two-way unless tagged otherwise.  Tagging the motorway as oneway=yes makes sure that routing calculations will work correctly.  Sections of motorways sometimes become two-way (usually with a safety barrier down the middle) when the other half of the motorway is closed for road construction.

Actually highway=motorway implies oneway=yes:
http://wiki.openstreetmap.org/wiki/Tag:highway%3Dmotorway