[Talk-us] Motorway vs trunk classification for RI-4 and US-1 in Rhode Island

[Evin Fairchild]

I'd agree with having US 1 be trunk through the RI 138 interchange. My rule
of thumb is that if there's a stretch of road that has an interchange
sandwiched between two at-grade intersections, then that whole road should
be tagged as trunk. Only if there's two or more consecutive interchanges
along a stretch of road should the road be tagged as motorway. This seems
to reflect standard tagging practice in the US.

Evin Fairchild (compdude)

On Tue, Jan 26, 2021, 11:30 AM Albert Pundt <roadsguy99 at gmail.com> wrote:

> (Resending because I forgot to Reply All.)
>
> The only unambiguously motorway section is RI 4 from I-95 down to the Oak
> Hill Road intersection. The remainder should be trunk, with the possible
> exception of the Wakefield bypass north of the turnarounds.
>
> Limited-access non-motorway segments should also be tagged with
> expressway=yes, namely the rest of RI 4 down to US 1, the segment around RI
> 138, and the Charlestown-Wakefield segment, which has occasional driveways,
> but seems to be a limited-access right-of-way.
>
> On Tue, Jan 26, 2021, 14:26 Albert Pundt <roadsguy99 at gmail.com> wrote:
>
>> The only unambiguously motorway section is RI 4 from I-95 down to the Oak
>> Hill Road intersection. The remainder should be trunk, with the possible
>> exception of the Wakefield bypass north of the turnarounds.
>>
>> Limited-access non-motorway segments should also be tagged with
>> expressway=yes, namely the rest of RI 4 down to US 1, the segment around RI
>> 138, and the Charlestown-Wakefield segment, which has occasional driveways,
>> but seems to be a limited-access right-of-way.
>>
>> On Tue, Jan 26, 2021, 12:54 Brian M. Sperlongano <zelonewolf at gmail.com>
>> wrote:
>>
>>> Hello,
>>>
>>> In response to recent edits[1-3], I would like some help in determining
>>> the proper road classification of RI-4 and its continuation on US-1 to
>>> Charlestown, RI, specifically whether certain portions should be classified
>>> as motorway rather than trunk.  At question is the classification of:
>>>
>>> 1. US-1 for a 1/2 mile stretch at its interchange with RI-138
>>> 2. US-1 for a 2-mile stretch east and south of Wakefield
>>> 3. US-1 between Wakefield and Charlestown
>>>
>>> See: https://osm.org/#map=14/41.5403/-71.4838 and pan south along the
>>> route to see how it is presently tagged.
>>>
>>> Route description:
>>>
>>> RI-4 begins at a freeway interchange with Interstate 95 in West Warwick,
>>> RI, and is built to Interstate standards until its intersection with a
>>> traffic signal and at-grade intersection with Oak Hill Road in North
>>> Kingstown.
>>>
>>> From Oak Hill road, for two miles, RI-4 is a divided, 4-lane road with
>>> signalized at-grade intersections until its signalized at-grade merge with
>>> US-1.  Within a few hundred yards, US-1 has non-crossing at-grade
>>> intersections with two residential streets (one on each side).
>>>
>>> Immediately south of these residential streets, US-1 goes through a full
>>> cloverleaf intersection with RI-138, built to Interstate standards (it was
>>> part of a later-abandoned Interstate expansion).
>>>
>>> For the next six miles, US-1 is a 4-line divided highway with signalized
>>> intersections and one-side intersections with surface roads until it
>>> approaches east of the village of Wakefield.
>>>
>>> For the next 2.3 miles, US-1 returns to grade-separated interchanges as
>>> it passes east and south of Wakefield.
>>>
>>> For the final 11 miles, US-1 features at-grade tight merges and exits on
>>> either side of the road, with frequent U-turn ramps in the wide median.
>>> Traffic that needs to cross US-1 needs to merge onto the highway, U-turn at
>>> the next median, and then take an off-ramp on the opposite side of the
>>> highway.  This stretch ends at a traffic light in Charlestown, after which
>>> it continues as a surface road with at-grade crossing intersections.
>>>
>>> [1] https://www.openstreetmap.org/changeset/98127926
>>> [2] https://www.openstreetmap.org/changeset/98150591
>>> [3] https://www.openstreetmap.org/changeset/98150825
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