[OSM-talk] Mottram Bypass - proposed roads

[Richard Bullock]

>
> 1) How does one tag something that is being considered seriously (such as
> the Mottram Tintwistle bypass), but which may well never get built? I 
> think
> I will just put the estimated build date given by the highways agency for
> now. (I will also continue to use the tunnel trick to get it to render in
> the mean time).
>
> 2) I have a more difficult job with the new Haughley Bends upgrade on the
> A14. A new section of A14 is being opened in the summer 08 and then the 
> old
> carriageways will be closed for 6 months and will then re-emerge as a
> tertiary road (the west carriageway) and a bridleway (the east 
> carriageway)
> for most of the old section in Dec08, although a couple of short bits will
> be grubbed up entirely and some new linking bits will be created. Is there
> any way of coding such a thing? I feel it may be better to create a
> relationship around all of the old stuff and say that it is going to go on
> the switchover date, and then separately model the new network for the
> replacement. Currently one has to add dates to every single little section
> of road and as the opening date slips one should really change all the 
> dates
> which would be bonkers. In reality when a scheme opens in parts one might
> have a series of versions of the model to be used in turn.
>
> I realise that I am pushing the model beyond its initial intentions but we
> are going to need to have robust ways of dealing with change.
>
>
If it's genuinely under construction now, then if you tag as
<k=highway v=construction>
<k=construction v=trunk> (or any other normal highway tag)

Then it will render as a dashed line in Osmarender (but not currently on 
Mapnik)

e.g. see the A5117 / M56 improvement scheme in West Cheshire
http://www.openstreetmap.org/?lat=53.2399&lon=-2.9631&zoom=14&layers=0BFT

I don't see much point in adding dates specifically. I don't think we should 
expect it all to show up as complete in the database magically on the date. 
It's not particularly difficult to change it to a highway=trunk (or 
whatever) when it's open. It's rare for a road scheme to open exactly on the 
stated date anyway, and that's assuming that the powers that be are going to 
be more specific than say, "opening Summer 08".

For the Haughley Bends (finally sorting that bit out), easiest is to tag as 
highway=construction,construction=trunk for the new section. When that's 
open, tag the old road as highway=construction,construction=tertiary, then 
when each bit opens, it can be tagged as normal.

Richard B