[Talk-us] US Trunk road tagging

[Minh Nguyen]

Vào lúc 12:22 2021-05-05, MoiraPrime via Talk-us đã viết:
> I personally think we should do the following
> 
> 1. Trunks should connect to other Trunks or a Motorway on both ends if possible. No Isolated islands.
> 
> 2. Motorways should be longer than 1 mile, be an incomplete under-construction interstate, or be connected to another motorway. Random short island sections of interstate existing solely because someone thinks an interchange meets motorway quality should not exist (which is a repeated topic in the OSM US Slack).

How would you define "incomplete, under-construction Interstate". Would 
this include situations where some segments of expressway have been 
upgraded to Interstate standards but other segments are still planned 
and unfunded? Or is it necessary that every segment of the highway is 
either fully upgraded or decorated by orange barrels? Off the top of my 
head, a bunch of projects in Texas would hinge on this question, such as 
I-69W/C/E and U.S. 175.

The Wilmington bypass I brought up in [1] might be a counterexample to 
this proposal as well, depending how strongly you feel about avoiding 
motorway islands.

> 3. Trunks should be important roads that fill in gaps in the Interstate system between two large cities. This can be 4 lane US highways, but it can also be 2 lane US highways, 4 lane state highways, you get the idea. The main idea is that the road is filling an important gap in the interstate system.

What about urban expressways? They fill local gaps but not between large 
cities. Sometimes they aren't even county roads. (Often they're symptoms 
of old shortsighted urban planning decisions, but that's a topic for 
another day...) At least NHS generally classifies them as Other 
Principal Arterials.

> Open to thoughts on this. It was on my mind all last night while I was dozing off to sleep.

I think all of us were dreaming we could solve road classification last 
night. ;-)

[1] https://lists.openstreetmap.org/pipermail/talk-us/2021-May/021044.html

-- 
minh at nguyen.cincinnati.oh.us