[OSM-talk] Dual carriageways

[Andy Robinson]

To further the work on this I would like to seed the proposed schema with
the regulatory and physical attributes of highways by country where these
are based on country standards. To do this it would be helpful if someone
would set up a wiki page that can gather this data by country.

For instance the main geometric configurations for all new UK roads are
covered here:

http://www.standardsforhighways.co.uk/dmrb/vol6/section1/td2705a.pdf 

With corresponding figures here:

http://www.standardsforhighways.co.uk/dmrb/vol6/section1/td2705b.pdf 

There are of cousre other statutory parameters such as speed limits etc
defined elswhere.

Cheers

Andy Robinson
Andy_J_Robinson at blueyonder.co.uk 

>-----Original Message-----
>From: talk-bounces at openstreetmap.org [mailto:talk-
>bounces at openstreetmap.org] On Behalf Of Etienne
>Sent: 19 October 2006 10:40 AM
>To: raphael Jacquot
>Cc: talk at openstreetmap.org
>Subject: Re: [OSM-talk] Dual carriageways
>
>I hope the next version of Map Features that Andy is working on will have a
>more structured approach to this problem.
>
>There should be a base level of tags that describe simple atomic
>attributes, like oneway=yes, lanes=3, car=yes, bicycle=no and then
>additional higher level tags that are short-cut definitions of a group of
>atomic tags.  So highway=fr:motorway would be explicitly and formally
>defined (in an xml document) as being equivalent to surface=tarmac,
>lanes=3, hardshoulder=yes, bicycle=no, car=yes, speedlimit=120km,
>speedlimit:rain=100km, etc.
>
>If someone makes a transformer that converts highway=motorway into its
>constituent parts then routing software can just look for oneway=yes and
>doesn't need to know how the French administration have arbitrarily defined
>a motorway.
>
>Etienne
>
>
>On 10/19/06, raphael Jacquot <sxpert at sxpert.org> wrote:
>
>	Etienne wrote:
>	> Bruce
>	> You shouldn't need to tag motorways as oneway because that is
>implied for a
>	> motorway.
>	>
>	> For other roads; trunk, primary, etc, you do need to tag each
>carriageway
>	> with oneway=yes otherwise there is no way to tell.
>	>
>	> FWIW there is no need to tag roundabouts as oneway either.  That
is
>an
>	> implied attribute of junction=roundabout.
>	>
>	> Etienne
>
>	imho, they should be. special casing in the routing algorithm is a
>	stupid idea
>
>