[talk-ph] Classification of the NLEx Tabang Spur Road
Eugene Alvin Villar
seav80 at gmail.com
Sat Jul 24 04:16:32 BST 2010
As for the Clark Spur Road, it looks kinda like an overly long link road.
But the connecting ramps to MacArthur Hwy makes me think that it might be a
very short motorway itself. I haven't formed an opinion on this road yet.
On Sat, Jul 24, 2010 at 11:11 AM, Eugene Alvin Villar <seav80 at gmail.com>wrote:
> Well, unlike the SCTEX-NLEX link road, the Tabang Spur Road is named "Road"
> and not "Link". In addition, the spur road itself has ramps from the Krus
> road  which suggests that the Tabang Spur Road itself functions as a
> motorway--a branch of NLEX. (Also, I think those ramps from Krus road are
> the actual motorway_links.) I guess MapQuest's rendering is a rendering
> problem, but ignoring Garmin's and MapQuest's data/rendering peculiarities
> for a moment, I am inclined to think that the Tabang Spur Road is a motorway
> itself based on the function.
>  http://osm.org/go/4zOraYSkS--
> On Sat, Jul 24, 2010 at 10:54 AM, Rally de Leon <ralleon at gmail.com> wrote:
>> Clark Spur Road (CSR) & Tabang Spur Road (TSR) can be seen on mapquest
>> at mapscale 3200meters & below, but both (and all motorwaylinks) start
>> to disappear from the mapquest at scale 7000meters & up.
>> I'm the one who converted TSR to motorwaylink (since it connects NLEX
>> to AH26), with the idea that we can make it appear on GPS maps to have
>> a better 'transition color' from motorway-to-trunk, or
>> motorway-to-primary, rather than from 'motorway color' directly (and
>> abruptly) to 'trunk or primary color', since some of them are
>> connected directly 'in-line'.
>> For uniformity, I just patterned TSR tag similar to existing CSR
>> 'motorway_link' tag (which connects NLEX to AH26 to SCTEX); 'coz as
>> the name suggests, it "links" :-) But the problem in both cases, is
>> that they are 'too long' to be noticed as 'missing' or disconnected
>> when you zoom out, unlike ordinary ramps.
>> Motorway Link is used on osmph mainly as tag for 'shorter' for
>> fast/slow exit roads (which have driving speeds between 30-60kmh
>> depending on the width/length).
>> In comparison to Garmin map (besides Motorway, Trunk & Primary Roads),
>> they assigned separate 'hexcodes' for 'Low-Speed Ramp (exit road)',
>> 'High-Speed Ramp (exit road)' & 'Major Highway Connector'; so it's
>> easy to manipulate the speed, how & when each will render on the map.
>> In the absence of differentiating tags in osmph, Spur road, Highway
>> Connectors & Ramps are tagged similarly as 'motorway_link', thus
>> creating this problem.
>> My impression of a 'Major Highway Connector' on Garmin maps: refers to
>> these long spur roads (ground level, tunnel or bridge), or even those
>> 'long unclassified flyovers' like the one that connects Global city to
>> Buendia. It passes over Kalayaan Ave & EDSA, yet this connector
>> road/bridge is not considered part or portion of 32nd St, Kalayaan Ave
>> or EDSA or Buendia. Its sole purpose is just to 'link' (major roads)
>> like 32nd St & Buendia.
>> Should we convert all long 'motorway_links' like Spur Roads to
>> 'motorways' (or primary roads depending on location), since they
>> function like a motorway (like limited exits, high-speed), if so what
>> is the minimum 'road length' to differentiate from motorway_links?
>> Or we leave them as it is, until a new osm classification is made for
>> 'spur road / major highway connector'?
>> Or we just ask mapquest to make motorwaylinks appear up to 7000meter scale
>> On Sat, Jul 24, 2010 at 1:20 AM, Eugene Alvin Villar <seav80 at gmail.com>
>> > Hi guys,
>> > I noticed that MapQuest doesn't render NLEx's Tabang Spur Road in lower
>> > levels and this is apparently because it is tagged as
>> > highway=motorway_link.
>> > Is this the correct classification? I think the whole spur road should
>> > be highway=motorway and the entry/exit ramps are the ones that should be
>> > highway=motorway_link. What do you think?
>> >  http://open.mapquest.co.uk/mq/9-9Gv6VZ29f2D8ToOQ6o1u
>> > Eugene
>> > _______________________________________________
>> > talk-ph mailing list
>> > talk-ph at openstreetmap.org
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