[Talk-us] "highway" tags in the US
Alex Mauer
hawke at hawkesnest.net
Tue Mar 4 06:09:42 GMT 2008
Karl Newman wrote:
>
> Agreed. The criteria listed on the Wiki page promote too many highways
> to "motorways". It's too hard to distinguish between them; in dense
> urban areas you could end up with a lot of "motorways". It seems to me
> the "motorway" tag should be reserved for interstates, with some
> exceptions for major US highways. You left out "tertiary" from your
> descriptions. I would see "tertiary" as an important thoroughfare road
> through a town--higher speeds and less traffic controls than
> "unclassified". How about these guidelines, based on speed limits and
> lanes:
>
> * motorway: Interstate, 2+ travel lanes, ramp access only, speed
> limit 65 MPH+
> * trunk: US highway, 2+ travel lanes, ramp access only, speed limit
> 60-70 MPH
> * primary: US highway, 1-2 travel lanes, or State highway, 2 travel
> lanes, speed limit 55-65 MPH, can have occasional
> stoplights/traffic controls
> * secondary: State highway, 1-2 travel lanes, or larger county
> highway, speed limit 45-55 MPH
> * tertiary: County highway, other unnumbered thoroughfare, speed
> limit 40-50 MPH
> * unclassified: urban commercial district or rural low-density
> housing, normally no direct driveway access to housing in urban or
> suburban areas, speed limit 30-40 MPH
> * missing_tag: It seems like there needs to be another
> classification for residential branch roads which are main roads
> through subdivisions but still have direct driveway access to
> housing.
> * residential: urban or suburban roads primarily for providing
> access to housing, speed limit 15-25 MPH
>
I agree, with the modification that trunk doesn't need to be ramp access
only, and that county highways are secondary.
I've used tertiary for the missing_tag you describe, as this seems to be
in line with the European tertiary roads. (these comments are also on
the wiki, I believe.
-Alex Mauer "hawke"
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