[Talk-us] Highway classification questions

Richard Welty rwelty at averillpark.net
Tue Oct 15 23:52:21 UTC 2013

On 10/15/13 7:29 PM, Tod Fitch wrote:
> ref: http://wiki.openstreetmap.org/wiki/California#Highway_types and
> http://wiki.openstreetmap.org/wiki/United_States_roads_tagging
> Specific questions:
> http://www.openstreetmap.org/#map=18/37.38554/-122.05217
> Should Central Expressway be marked as primary rather than trunk at
> this point? The existence of a traffic signal indicates that it does
> not always have right of way. Other sections of Central Expressway are
> grade separated with limited access and highway=trunk makes sense to
> me but not here.
i think it's ok for trunks in the US to have traffic lights. they
probably shouldn't have
a bunch of connecting side roads. an example in NY is Washington Avenue
in Albany, which is a 55mph road with a limited number of traffic lights
and a
frontage road system providing access to the host of office buildings:


grade separated/limited access is usually a sign of a motorway.

> http://www.openstreetmap.org/#map=16/37.7751/-120.7939
> Highway 120/108 at this point is a two lane road. Side roads have stop
> signs. Other areas similar to this have the highway tagged as primary
> or secondary, not trunk. Even highway 120 and highway 108 further west
> of this are tagged primary rather than trunk.
this is probably primary/secondary
> http://www.openstreetmap.org/#map=16/37.9772/-120.3549
> In this area highway 108 is a "super two", one lane each way,
> undivided, but with grade separation and limited access. How do people
> typically classify a super two?
super twos generally are trunks.


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