On 5/27/11 12:00 PM, Alex Mauer wrote:
On 05/27/2011 09:06 AM, Richard Welty wrote:
if you peruse the wiki, and make a reasonably through search
for definitions of trunk in the US, you will find an extensive
complex of contradictions and inconsistencies.
Maybe someone should find all these and bring it up on the list so that
a definition can be determined and the inconsistencies can be fixed?
Just saying “the definition is inconsistent so I’ll just use my own
interpretation” isn’t very constructive.
as it happens, i did this a while back. there may have been edits since
i collected this stuff, but i included the URLs where the text came from
for a reason.
Definitions found in the Wiki:
Generic definition from
http://wiki.openstreetmap.org/wiki/Map_Features#Highway
Important roads that aren't motorways. Typically maintained by central,
not local government. Need not necessarily be a divided highway. In the
UK, all green signed A roads are, in OSM, classed as 'trunk'.
From http://wiki.openstreetmap.org/wiki/Trunk#International_equivalence
Divided highway without ramps.
Higher speeds (65+mph). This includes some US highways and some state
highways.
From
http://wiki.openstreetmap.org/wiki/United_States_roads_tagging#Trunk_tag
(Interstate Highway section of page)
Trunk tag
NOTE: The definition below is not commonly used; see the talk page.
Many people use trunk to mean "expressway"-grade arterials with at-grade
intersections, major non-motorway intercity highways, or both.
Most controlled-access highways without adequate speed or travel lanes
or with obstructions should be designated highway=trunk. This
designation applies, for example, to the two-lane Interstate 93 in
northern New Hampshire. highway=trunk should apply to any segment,
travel on which typically implies or necessitates clearing the
obstruction. Any ramps onto or from a trunk highway get
highway=trunk_link, even if they otherwise qualify for
highway=motorway_link. Ramps leading into or from weigh stations,
inspection booths, welcome centers, rest areas, and similar diversions
accessible only from a trunk or motorway highway also carry
highway=trunk_link.
Trunk highways include controlled-access highways that lie within
military bases; contain draw bridges, toll booths, or other obstructions;
have a speed limit less than 50 miles per hour; or have only one lane in
each direction, whether divided or otherwise (sometimes called a
"super-two" freeway). The designations highway=trunk and
highway=trunk_link apply to all toll roads.
From
http://wiki.openstreetmap.org/wiki/United_States_roads_tagging#Motorway_and_Trunk_tags
(United States Highway section of page)
Motorway and Trunk tags
If any segment of a U.S. highway or any other road merits
highway=motorway or highway=trunk according to the criteria
heretofore described, it should be so designated.
From the talk side of US tagging (note that there is extensive
discussion which
i have not copied into this document)
http://wiki.openstreetmap.org/wiki/Talk:United_States_roads_tagging#Trunk
Trunk
Unless part of the "Interstate system"
* An Arterial Divided highway that is partially but not entirely
grade separated.
From http://wiki.openstreetmap.org/wiki/Roads#USA
US Highways should be tagged with highway=primary. State Highways and
County Highways should be tagged with highway=secondary. Any of these
which is a divided highway with high speeds (65mph+) and intersections
with other roads, and legal for bicycles and motorbikes to use, should be
tagged with highway=trunk.
_______________________________________________
Talk-us mailing list
[email protected]
http://lists.openstreetmap.org/listinfo/talk-us
