Charlotte Wolter <techl...@techlady.com> writes: > I'm working on US 50 near Trenton, Ill. Here's the location: > http://www.openstreetmap.org/edit?lat=38.61248&lon=-89.68529&zoom=16 > It looks like, at one point there were plans to turn this into > a motorway. In two spots in a 25-mile stretch, intersections have been > turned into cloverleafs and the highway divided. In other locations, > roads that used to intersect US 50 have been turned into > overpasses. There are even a couple of bridges for a second lane but > no evidence of any construction work actually to build that lane. The > vast majority of the highway is still two-lane blacktop. > So how does one tag this, as a primary road that just has a > couple of cloverleafs?
My take is: motorway: truly meets interstate specs for extended periods - multi lane, no at-grade intersections. I would not tag something as motorway when it's only sometimes motorway unless it's ~10 miles long. primary: US highway or road of equivalent social importance. No other requirements trunk: more important than primary, and mostly divided, or mostly not having at-grade intersections, kind of high speed. can be jersey barriers with at-grade intersections only every mile where it's posted 50 mph+. can be interstate-class except with one lane.. So, if this feels like mostly a busy road where you can only go 30 with stores along it, tag it primary. if it feels like you can drive 60 in a 50 zone and that's ok, and at-grade intersections are rare, tag it trunk. If the part you want to tag trunk is less than say two miles, don't do it and leave it primary. For a reasonable example, look at route 2 in massachusetts. culturally, MA-2 is as important as US 20 (at least for us north-half residents :-), and sometimes it's motorway, sometimes trunk, and sometimes just primary.
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