Re: [talk-ph] Tagging of implied speed limits

[Erwin Olario]

The speed limit used by some routing applications, per country, was
docmented here:
https://wiki.openstreetmap.org/wiki/OSM_tags_for_routing/Maxspeed#Philippines

This is where some routing apps use for their calculations based on implied
speeds. The actual speed limits tags on specific ways (based on what's on
the ground) is used by the navigation app that consumes OSM data.

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On Mon, Dec 2, 2019 at 1:33 PM Jherome Miguel 
wrote:

> While there haven't been a decision on revising the existing
> classifications
> for roads, I am also considering discussing a tagging scheme for implied
> speed limits (those not indicated by a sign). I have been experimenting
> with tagging of those unsigned speed limits on some of my last edits, but
> I'm also thinking of a standard for the country.
>
> 
>
> The default speed limits for the Philippines (as codified in the Land
> Transportation and Traffic Code or Republic Act 4136) are as follows
>
> 80 kph (50 for heavy trucks and buses) - "open country" roads
> 40 kph (30 for trucks and buses) - "through" roads within built-up area
> 30 kph - "non-through" roads within built-up areas
> 20 kph - crowded streets
>
> In addition, many major rural roads may have lower implied limits (e.g. 40
> kph) due to factors such as pedestrians walking on the road, and some major
> urban roads may have a higher limit (e.g. 60 for multi-lane roads or other
> roads where pedestrians don't frequently cross or walk alongside vehicles).
>
> Expressways are not covered by RA 4136, but there seems to be these
> defaults (almost all of these explicitly marked by standard circular signs):
>
> 100 (80 for heavy trucks and buses) - rural
> 80 - urban
> 60 - minimum
>
> 
>
> These defaults, in turn, corresponds to these possible values for OSM
> (along with the corresponding numeric value:
>
> - PH:rural - 80
> - PH:urban - 30 (minor through roads within cities/municipalities,
> generally those classified tertiary), 40 (all other major roads), 60
> (higher-quality roads, generally multi-lane)
> -PH:living_street - 20 (note: includes anything classified unclassified,
> residential and service, not only those classified living_street)
>
> Important questions are:
>
> 1.) How should we handle the RA 4136 categories: source:maxspeed= or
> maxspeed:type=?
> 2.) Is this already a fine proposal, or this may need some tweaking?
>
> --TagaSanPedroAko
> ___
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> talk-ph@openstreetmap.org
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>
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Re: [talk-ph] Tagging of implied speed limits

[Glen Scott]

My limited experience in a limited number of provincial areas:

Local PNP Sargent told me that they don't enforce speed. The city's speed
limit (built up area) is 20 km/h everywhere (as set by the city council);
this is generally ignored.

Without speed tagging, auto-routing on a GPS is useless, it simply takes
the shortest route over the slowest roads.

Out of the city proper, the classification of the road is not a great
indicator of the comfortable speed of the road - some significant routes
can be in poor condition (sealed or un-sealed). The "legal" speed is often
greater than the comfortably achievable speed.

Strict tagging of road speeds based on their classification will lead to
some poor auto-routing, where the GPS takes a bad road. I've been a bit
naughty and have been guilty of tagging roads in a way that forces the GPS
to take to best route, regardless of classification (i.e. tag to quality).
I know this is not an appropriate tagging recipe  just putting it out
there that some wriggle room is needed if auto-routing in rural areas is
to  be considered. Maybe an informal thing?







On Mon, Dec 2, 2019 at 4:33 PM Jherome Miguel 
wrote:

> While there haven't been a decision on revising the existing
> classifications
> for roads, I am also considering discussing a tagging scheme for implied
> speed limits (those not indicated by a sign). I have been experimenting
> with tagging of those unsigned speed limits on some of my last edits, but
> I'm also thinking of a standard for the country.
>
> 
>
> The default speed limits for the Philippines (as codified in the Land
> Transportation and Traffic Code or Republic Act 4136) are as follows
>
> 80 kph (50 for heavy trucks and buses) - "open country" roads
> 40 kph (30 for trucks and buses) - "through" roads within built-up area
> 30 kph - "non-through" roads within built-up areas
> 20 kph - crowded streets
>
> In addition, many major rural roads may have lower implied limits (e.g. 40
> kph) due to factors such as pedestrians walking on the road, and some major
> urban roads may have a higher limit (e.g. 60 for multi-lane roads or other
> roads where pedestrians don't frequently cross or walk alongside vehicles).
>
> Expressways are not covered by RA 4136, but there seems to be these
> defaults (almost all of these explicitly marked by standard circular signs):
>
> 100 (80 for heavy trucks and buses) - rural
> 80 - urban
> 60 - minimum
>
> 
>
> These defaults, in turn, corresponds to these possible values for OSM
> (along with the corresponding numeric value:
>
> - PH:rural - 80
> - PH:urban - 30 (minor through roads within cities/municipalities,
> generally those classified tertiary), 40 (all other major roads), 60
> (higher-quality roads, generally multi-lane)
> -PH:living_street - 20 (note: includes anything classified unclassified,
> residential and service, not only those classified living_street)
>
> Important questions are:
>
> 1.) How should we handle the RA 4136 categories: source:maxspeed= or
> maxspeed:type=?
> 2.) Is this already a fine proposal, or this may need some tweaking?
>
> --TagaSanPedroAko
> ___
> talk-ph mailing list
> talk-ph@openstreetmap.org
> https://lists.openstreetmap.org/listinfo/talk-ph
>
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[talk-ph] Tagging of implied speed limits

[Jherome Miguel]

While there haven't been a decision on revising the existing
classifications
for roads, I am also considering discussing a tagging scheme for implied
speed limits (those not indicated by a sign). I have been experimenting
with tagging of those unsigned speed limits on some of my last edits, but
I'm also thinking of a standard for the country.



The default speed limits for the Philippines (as codified in the Land
Transportation and Traffic Code or Republic Act 4136) are as follows

80 kph (50 for heavy trucks and buses) - "open country" roads
40 kph (30 for trucks and buses) - "through" roads within built-up area
30 kph - "non-through" roads within built-up areas
20 kph - crowded streets

In addition, many major rural roads may have lower implied limits (e.g. 40
kph) due to factors such as pedestrians walking on the road, and some major
urban roads may have a higher limit (e.g. 60 for multi-lane roads or other
roads where pedestrians don't frequently cross or walk alongside vehicles).

Expressways are not covered by RA 4136, but there seems to be these
defaults (almost all of these explicitly marked by standard circular signs):

100 (80 for heavy trucks and buses) - rural
80 - urban
60 - minimum



These defaults, in turn, corresponds to these possible values for OSM
(along with the corresponding numeric value:

- PH:rural - 80
- PH:urban - 30 (minor through roads within cities/municipalities,
generally those classified tertiary), 40 (all other major roads), 60
(higher-quality roads, generally multi-lane)
-PH:living_street - 20 (note: includes anything classified unclassified,
residential and service, not only those classified living_street)

Important questions are:

1.) How should we handle the RA 4136 categories: source:maxspeed= or
maxspeed:type=?
2.) Is this already a fine proposal, or this may need some tweaking?

--TagaSanPedroAko
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