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Wow Alberto, you have put a lot of thought into this. I agree its
needed and think the model would serve us a lot better than the way
its done now. But I see a couple of problems, first, we have a huge
data set using the existing model. Very hard to change that.
Secondly, I suspect not all contributers to OSM are familiar with
the sort of roads that have prompted your proposal. So, wide spread
support may be a bit hard to find.<br>
<br>
But I'd be the last to suggest you give up something just because
its impossible !<br>
<br>
So, lets pick it over.<br>
<br>
Firstly, maybe your categories might need to be a bit finer
grained. For example, the jump, in Rural, 3 Tertiary and 4
Unclassified is too big. I live on a rural road, its not a
connecting road and it is owned and maintained (occasionally) by the
Municipality. So its definitely a public access road but not one a
routing engine should consider (except start and end stages of
course). Such roads are very common.<br>
<br>
I am not sure I like the classification you use for C Road
Condition. It seems a bit too focused on maintenance models rather
than providing an indication of how a traveler might find it. I
suggest what a map (or whatever) user wants to know is "should I use
this road ?". And that, of course, is dependent on vehicle, maybe
affected by weather, maintenance cycles and so on.<br>
<br>
Alberto, I'd like to see this model refined, lets make out that we
are starting fresh, get it right and then look to see if some of the
result can be incorporated into the current model, or even a long
term transition ?<br>
<br>
David<br>
<br>
<div class="moz-cite-prefix">On 06/03/16 01:25, Alberto wrote:<br>
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<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
Dear OSM staff, contributors, and users:</p>
<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
I have read the definitions, concepts and description that OSM
uses to characterize (tag) roads and noticed that OSM does
not establish the difference between inter-urban (rural) roads
and urban roads (comprising mostly avenues and
streets). Therefore, I propose to <strong>replace the
existing OSM road classification with a "functional
classification"</strong> that would allow OSM
<strong>"to better model and better visualize"</strong> the
actual road network. I have noticed that you have been
challenged to adapt to the differences found in each country.
If the following classification is adopted, it will be a "<strong>universal
standard</strong>" and you will not need to adopt different
criteria for developed or developing countries, like the OSM
example for East Africa.
</p>
<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
It would be useful to define a road class (paved/unpaved) and
a road surface type (concrete, asphalt, surface
treatment, gravel, earth). I also propose to reduce the
options for road condition to only five categories defined by
the need for maintenance or rehabilitation. I can provide a
technical definition using the International Roughness Index
(IRI) for paved and unpaved roads.
</p>
<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
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<br>
</p>
<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
I am fully aware that these changes present a major challenge
for the existing, coding, renderer, editors, etc. However, I
am confident that introducing these changes (and adding the
number of lanes) will not only simplify the mapping tasks, but
would substantially improve the quality of the OMS products,
particularly given the fact that many other layers are highly
dependent on the quality of the road network.</p>
<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
<br>
</p>
<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
I am a Civil Engineer (MS Stanford) with training on urban
planning (MIT) with more than 20 years of experience working
with international organizations like the World Bank and the
African Development Bank on roads and highways in more than 50
countries, but mostly in Sub-Saharan Africa, South America,
South Asia, East Asia and the Pacific, and Eastern Europe.</p>
<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
Alberto Nogales</p>
<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
202-257-8726</p>
<div style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
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<p style="color: rgb(0, 0, 0); font-family:
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<br>
</p>
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<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
<strong>A. FUNCTIONAL ROAD CLASSIFICATION for "Motor
Vehicles":</strong></p>
<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
<strong><br>
</strong></p>
<div style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
</div>
<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
<strong>Rural (Inter-Urban) Roads - Located outside of urban
areas</strong></p>
<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
<strong>Classified Road Network. </strong>Generally falls
under the responsibility of the National, Provincial (State),
Municipal/Local Government to build, operate and maintain.</p>
<div style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
</div>
<blockquote style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
margin-right: 0px; background-color: rgb(255, 255, 255);"
dir="ltr">
<p><strong>1.</strong> <strong>Primary</strong> Roads -
National, Main, Trunk Roads outside of urban areas that
connect the main population and economic centers of the
country. Typically under the responsibility of the National
Government and with high levels of traffic.</p>
<p><strong>2.</strong> <strong>Secondary</strong> Roads -
Regional, State, Provincial Roads are the main feeder routes
into, and provide the main links between primary roads.
Typically under the responsibility of the Provincial
Government and with medium levels of traffic.</p>
<p><strong>3.</strong> <strong>Tertiary</strong> Roads -
Municipal, Local, Rural Roads that connect the smaller towns
to intermediate cities. Typically under the responsibility
of the Local Governments and with low levels of traffic.</p>
</blockquote>
<div style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
</div>
<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
<strong>Unclassified Road Network.</strong> </p>
<blockquote style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
margin-right: 0px; background-color: rgb(255, 255, 255);"
dir="ltr">
<p><strong>4. Unclassified</strong> Roads. Mostly private
roads or of unknown responsibility to build and operate.
Typically maintained by local communities or by private
mining, forestry, or agricultural enterprises.</p>
</blockquote>
<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
<strong>Urban Network- Located within the boundaries of urban
areas</strong></p>
<div style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
</div>
<blockquote style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
margin-right: 0px; background-color: rgb(255, 255, 255);"
dir="ltr">
<p style="margin-right: 0px;" dir="ltr"><span><strong>1/2/3.</strong>
<strong>Highway.</strong> [Expressway, Motorways] Parts of
the Primary, Secondary or Tertiary Roads that go across an
urban area. Parts of the National, Provincial Network.
Expressways with limited access. Typically no pedestrian
or bicycle access.</span></p>
</blockquote>
<span>
<blockquote style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
margin-right: 0px; background-color: rgb(255, 255, 255);"
dir="ltr">
<p><strong>5. </strong><strong>Arterial</strong>. [Route,
Boulevard] Connecting key areas of urban activity with
higher traffic levels and longest trip lengths. High
speeds with minimum interference to through movements,
like those used by bus routes.</p>
<p><strong>6.</strong> <strong>Collector</strong>. [Avenue]
Provides land access and traffic circulation within urban
areas. Penetrates neighborhoods, collecting and
distributing traffic between neighborhoods and arterial
network. Medium traffic levels with moderate trip lengths.
Medium speeds with frequent interference to through
movements.</p>
<p><strong>7. </strong><strong>Local</strong>.
[Street] Road used to provide access to adjacent land and
to the collector network and to higher order of streets.
Lower traffic level with through traffic deliberately
discouraged. Low speed.</p>
<p><strong>8. </strong><strong>Path</strong>. [Lane,
Passage] Narrow mostly single lane in between buildings or
behind a row of houses without sidewalks. Single direction
and lowest level of traffic and lowest speed.</p>
</blockquote>
<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
</p>
</span>
<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
<span><strong>Add Classification for "Non-Motor Vehicles" that
will not use the term road nor highways, like bicycle
lane, pedestrian paths, etc.</strong> </span></p>
<div style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
</div>
<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
<span><br>
</span></p>
<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
<span><strong>Total Road Network = Primary + Secondary +
Tertiary + Unclassified + Urban</strong></span></p>
<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
<span><strong><br>
</strong></span></p>
<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
<span><strong>B. ROAD SURFACE CLASS (Paved/Unpaved) & ROAD
SURFACE TYPE</strong></span></p>
<blockquote style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
margin-right: 0px; background-color: rgb(255, 255, 255);"
dir="ltr">
<p><span><strong>1. Paved</strong></span></p>
<blockquote style="margin-right: 0px;" dir="ltr">
<p><span><strong>1.1 Concrete</strong></span></p>
<p><span><strong>1.2 Asphalt</strong></span></p>
<p><span><strong>1.3 Surface Treatment</strong></span></p>
</blockquote>
<p><span><strong>2. Unpaved</strong></span></p>
<blockquote style="margin-right: 0px;" dir="ltr">
<p><span><strong>2.1 Gravel</strong></span></p>
<p><span><strong>2.2 Earth</strong></span></p>
</blockquote>
</blockquote>
<span>
<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
<span><strong>C. ROAD CONDITION</strong></span></p>
<blockquote style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
margin-right: 0px; background-color: rgb(255, 255, 255);"
dir="ltr">
<p><strong>1. Very Good. </strong>Roads do not require any
capital costs. Recently completed and/or very good quality
and high standard.</p>
<p><strong>2. Good. </strong>Roads largely free of defects
and require only minor maintenance work.</p>
<p><strong>3. Fair.</strong> Road with defects that require
periodic maintenance like resurfacing or regravelling, or
grading.</p>
<p><strong>4. Poor. </strong>Roads require partial
rehabilitation, strengthening or partial reconstruction.</p>
<p><strong>5. Very Poor.</strong> Road requires full
rehabilitation or full reconstruction.</p>
</blockquote>
</span>
<div style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
<span></span></div>
<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
<strong>D. NUMBER OF LANES AND/OR <strong>ROAD WIDTH</strong>.
</strong>The functional classification can be further improved
by providing the number of lanes and traffic flow direction,
and the width of the main carriageway. it is also useful to
indicate if the road is physically divided or not by a median
or other. As for the urban roads indicate if the roads have
sidewalks or not.</p>
<blockquote style="margin-right: 0px;" dir="ltr">
<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
<strong>1. 1 LANE</strong></p>
<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
<strong>2. 2 LANES</strong></p>
<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
<strong>3. 3 LANES</strong></p>
<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
<strong>4. 4 LANES</strong></p>
<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
<strong>5. 5 LANES</strong></p>
<p style="color: rgb(0, 0, 0); font-family:
Calibri,Arial,Helvetica,sans-serif; font-size: 12pt;
background-color: rgb(255, 255, 255);">
<strong>6. 6 or more LANES</strong> </p>
</blockquote>
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