[Talk-us] weeklyOSM #354 25/04/2017-01/05/2017

[weeklyteam]

The weekly round-up of OSM news, issue # 354,
is now available online in English, giving as always a summary of all things 
happening in the openstreetmap world:

http://www.weeklyosm.eu/en/archives/9034/

Enjoy!

weeklyOSM? 
who?: https://wiki.openstreetmap.org/wiki/WeeklyOSM#Available_Languages 
where?: 
https://umap.openstreetmap.fr/en/map/weeklyosm-is-currently-produced-in_56718#2/8.6/108.3
___
Talk-us mailing list
Talk-us@openstreetmap.org
https://lists.openstreetmap.org/listinfo/talk-us

Re: [Talk-us] Speed limit editing in Detroit

[Mark Wagner]

On Fri, 5 May 2017 12:55:55 +
Horea Meleg  wrote:

> Hello all,,
> Me and my Telenav colleagues are planning to start editing speed
> limit in Detroit area and we found the following situation:
> 
>   1.  There's a trunk road which continues with a motorway but we
> don't have a speed limit sign at the beginning of the motorway. Do
> you think we should add the speed limit value from position 1 or 2 on
> the highlighted segment? 42.4985931, -83.3042949 --> Position 1 (50
> mph) 42.4941433, -83.2950564 --> Position 2 (70 mph)

The speed limit from (1) should be used.  A change of road
classification doesn't automatically imply a change in speed limit.
 
>   1.  A lot of motorway_links don't have a speed limit sign. Do you
> have any idea where could we get the speed limit values from? Thank
> you, Horea Meleg

In general, motorway_links to a motorway are treated by everyone
(drivers, police, courts) as having speed limits equal to the speed
limit of the motorway they provide access to.  Links from a motorway
are treated as a "transition zone" where you are expected to be going
the motorway's speed limit at the start of the link, and the
destination road's speed limit at the end.  Advisory speed limit signs
are common, while signed mandatory limits are extremely rare.

-- 
Mark

___
Talk-us mailing list
Talk-us@openstreetmap.org
https://lists.openstreetmap.org/listinfo/talk-us

[Talk-us] talk-US@openstreetmap.org

[Michael Patrick]

>
>   1.  A lot of motorway_links don't have a speed limit sign. Do you have
> any idea where could we get the speed limit values from?
>

For some routes, the state usually has speeds assigned to road segments for
regional transportation planning. If it's a more local route, that's
problematic - when I lived there practically any sign was scavenged for
scrap. And folks drove as fast as possible and didn't stop at red lights. I
hope it has gotten better. There's not much on the Socrata Open Data site,
either.

https://www.mcgi.state.mi.us/mgdl/?rel=ext=cext
https://www.mcgi.state.mi.us/mgdl/?rel=cext=Wayne
___
Talk-us mailing list
Talk-us@openstreetmap.org
https://lists.openstreetmap.org/listinfo/talk-us