[Talk-il] conventions for tagging roads

[Yuri Magrisso]

Hi guys,

I got the impression that you approve of the inter-city conventions.
Regarding the city conventions I am less sure what to do and I'll would like
to hear from you. Here are two questions to kick-off things:

Do you think it is correct to use the tags: 'primary', 'secondary', and
'tertiary' for city roads?

If yes, what do you think about the city conventions?

Regards,
Yuri

On Fri, Oct 17, 2008 at 3:53 PM, Yuri Magrisso <yumariso at gmail.com> wrote:

> Hi,
>
> I started discussing with Baruch a new convention for tagging roads. I'll
> rehash things to have it all in one place -
>
> Currently the convention for tagging roads is based on the road numbers. A
> more reasonable approach would be to tag roads based on their quality,
> because then the coloring of the road would provide another useful bit of
> information. I think we can judge the road quality by the speed limit,
> number of lanes, types of intersections and their frequency. Here's a first
> version for a conventions that follow this principle:
>
> Intercity roads
>
> The tag "highway=motorway" should be used on roads that have a speed limit
> of 100 km/h or more, have at least two lanes in each direction and have
> multi-level intersections (no traffic lights or unregulated intersections).
> (I think traffic authorities give a speed limit of 100 or more only to roads
> that meet the other two conditions, so they may be redundant).
>
> The tag "highway=trunk" should be used on roads that have a speed limit of
> 90 km/h, have at least two lanes in each direction and have mostly
> traffic-light or multi-level intersections.
>
> The tag "highway=primary" should be used on roads that have a speed limit
> of 90 km/h, have one lane in each direction and a clearly marked side-lane.
> The tag "highway=secondary" should be used on roads that have two clearly
> separated lanes, one for each direction.
>
> The tag "highway=tertiary" should be used on roads that do not meet any of
> the above requirement sets (have only one lane), but at-least have asphalt
> layer.
>
>
> City roads
>
> Inside a city the "motorway" and "trunk" tags can be used if the intercity
> conditions are met, or if they are a continuation of a road having the same
> tag and the speed limit difference is no more than 10 km/h.
>
> The tag "highway=primary" should be used for roads that have a speed limit
> of 60 km/h or more, have at least two lanes in each direction and have
> mostly traffic-light crossroads, with no unregulated crossroads that cross
> the lanes in both directions.
>
> The tag "highway=secondary" should be used on roads that have a speed limit
> of 60 km/h or more, and have at least two lanes in each direction.
>
> The tag "highway=tertiary" should be used on roads with speed limit of 50
> km/h, that have two lanes in each direction.
>
> Roads with one lane in each direction should be tagged as
> "highway=residential". Roads on which pedestrians are given right should be
> tagged as "highway=living_street".
>
> City roads can be tagged as "primary" or "secondary" based on how central
> they are for the city even if they do not meet all the requirements. If you
> are not a resident of the city you can probably judge the importance of a
> road by the presence of important commercial or administrative buildings
> like a mall or a municipality.
>
> What do you think?
> Yuri
>
>
>>
>> Hi Yuri,
>>
>> Baruch has sent you a message through OpenStreetMap with the subject "Re:
>> road conventions":
>>
>> ==
>> Hi,
>>
>> I agree about that, the road numbers are only good as a first degree
>> approximation. I did notice road number 3 which is fine but not motorway
>> quality and it was a worse road before that.
>>
>> If you can whip up a proposal we can flesh it out and offer it on talk-il.
>> Better yet, email it to talk-il so that everyone can participate in the
>> discussion.
>>
>> Baruch
>>
>> On Thu Oct 09 14:53:00 +0100 2008 Yuri wrote:
>>
>> > Hi Baruch,
>> >
>> > I have a few suggestions on how to tag roads. The basic idea is that the
>> road type should represent the road quality so to say. If we tag roads
>> according to their numbering we are not giving any additional useful
>> information.
>> >
>> > I think that the primary factors for choosing the road type should be
>> the speed limit, the number of lanes and the type of intersections on the
>> road.
>> > For example to qualify a road as 'motorway' it should have a speed limit
>> of 100 or above, have at least two lanes and use multi-level intersections
>> (no traffic lights). For trunk roads the speed limit should be 90, again at
>> least two lanes, but you can have traffic light intersections.
>> >
>> > If you like the idea, we can ping-pong a more detailed convention - for
>> intercity roads it is fairly easy. For city roads it will be more
>> problematic, but we can set up some guidelines there too.
>> >
>> > You can email me at yumariso at gmail dot com.
>> >
>> > Best regards,
>> > Yuri
>> ==
>>
>>
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