[Talk-GB] Maxspeed conundrum

Peter Miller peter.miller at itoworld.com
Fri Jul 29 14:11:46 BST 2011

I suggest that any 'temporary' speed limit change that will last more than 6
months could reasonably be tagged in maxspeed. Shorter periods should
probably use a maxspeed:temporary or some other suitable overriding tag?

Fyi, I have used 'proposed:maxspeed' to hold the intended new value where
signals are being introduced. 'construction:maxspeed' would I guess be
appropriate where work has started. I have also used construction:lanes for
sections of the M25 where the number of lanes is changing from 3 to 4. Also
construction:oneway=no for a section of the A11 which will become a 2-way
road when the A11 dualling is complete.

Here are some examples:
http://www.openstreetmap.org/browse/way/4546874 (proposed:maxspeed)
http://www.openstreetmap.org/browse/way/26295971 (construction:lanes)

If we go with the above speed limit tagging then it might be worth updating
the ITO speed limit view to show temporary and planned changes to speed



On 29 July 2011 10:27, Kev js1982 <osm at kevswindells.eu> wrote:

> on the a46 dualling I have been putting the reduced limits in, but here the
> road is on a new alignment so its for the rest of the life of the road
> (until is becomes part of ncn route 48 anyway!) .
> Shame there's no way AFAIK of tagging fixme:2013-05-01=roadworks due to
> finish,  resurvey alignment/maxspeed
> and then have openstreet bugs ignore until that date (unless you wish to
> see them)!
> On 29 Jul 2011 10:13, "Brian Prangle" <bprangle at gmail.com> wrote:
> The  M1 between junctions 11 and 13  is a standard 70 mph  NSL, but until
> spring 2013 it  is a 50mph average speed camera regulated section during
> upgrade works. After Spring 2013 it will become maxspeed=signals.  How to
> tag it?  My preference would be for the 50mph average speed with a note that
> it ends spring 2013. My guess is that sections rolling from the South will
> transform from 50 mph to maxspeed=signals, so those of you who travel this
> section of the M1 should watch out for the big switch on and edit
> appropriately - it will certainly make life swifter than the current
> congestion.
> As a general point do routing and travel planner algorithms make use of
> these long term construction speed restrictions?
> Regards
> Brian
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