Richie Kennedy <[email protected]> writes: > On Thu, Oct 5, 2017 at 7:48 PM, Paul Johnson <[email protected]> wrote: > >> Alternatively, a single >> carriageway that is limited access, ie, no intersections, no driveways, only >> ramps (eg, Chickasaw Turnpike in Oklahoma). Essentially, almost a motorway >> but not quite there. > > I *strongly* dispute Paul's assertion that a highway that has fully > controlled access but is single carriageway should be "trunk" instead > of "motorway." Access control, not number of lanes, should be the > primary guidance behind a motorway or trunk classification.
I'm with Paul here. To be motorway, there are three critical characteristics: divided >=2 lanes each direction (so passing is possible) limited access If those aren't all true, then it just isn't a motorway. (I gather there is a road in Alaska labeled Interstate that doesn't meet all those, and I don't mind if the locals want to make an exception. But if it isn't signed I-, then I don't think there should be exceptions.) To answer Martijn's question, I also agree with Paul that "trunk" is something that has a substantial part of the feel of a motorway. It might be only one lane in each direction (in NE we do not use the term super two), it might not be really divided, and it might have occasional driveways (at most one every quarter mile on average?) or at-grade intersections with lights every few miles. We should realize that the current tags are the result of a long historical process, including a few mappers that had a minority few that there should be more higher-classification roads, and did massive amounts of armchair retagging.
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