[talk-au] Road classification in AUS

Sebastian S. mapping at consebt.de
Thu Jul 25 13:06:32 UTC 2019

Hi Aleksandar,

Just in case you have not reviewed it, there Is a wiki page Australian tagging guideline https://wiki.openstreetmap.org/wiki/Australian_Tagging_Guidelines

However Regarding your question 1 mayor road classification has always been a no-go for me.
E.g. A8 Pittwater Road, North of Sydney, NSW.

It is an 'A' road according to Wikipedia these As are "primary highways, including urban arterials and interstate or interregional single carriageways."

Now for the most part the A8 has two or more lanes that are separated, however the road is also lined with intersections with red lights, driveways and houses. It is an important and high capacity road.

While the first points to me indicate it should be highway=trunk the last points make me think it should be highway=primary.

As I often find myself in similar dilemmas I tend to not change the classification.

Aside from providing some examples of your cases I ask you what is your driver to look at the road classification and see the need to revise it?

What are the benefits of a road changing between trunk and primary? What does it do for map users and data consumers?

The way I understand your email you refer to major review of the classification and not a fix if a single local point.

Or do you consider the classification of (some) roads that wrong that you can't live with it?

Curious, Sebastian
Sent from my Android device with K-9 Mail. Please excuse my brevity.

On 23 July 2019 12:50:19 am AEST, "Aleksandar Matejevic (E-Search) via Talk-au" <talk-au at openstreetmap.org> wrote:
>Hi all,
>My name is Aleksandar Matejevic, I work for Microsoft OSM Editorial
>team. In order to make the best decision in classifying roads across
>Australia, I need some help.
>In government data and on signposts you can find on mapillary and/or
>open street cam, you can track route numbers. I found out that routes
>mostly consist of:
>M route - motorways
>A route - trunks
>B route - primary roads
>C route - secondary roads
>As long you map in non-urban area this is 99.99% true, but when you map
>into city area it starts to get confusing.
>On this wiki page https://en.wikipedia.org/wiki/Highways_in_Australia
>there is no real explanation how to classify AUS roads in OSM
>If you strictly follow this page:
>https://wiki.openstreetmap.org/wiki/Key:highway than you should change
>road classification several times on the same route way.
>Therefore I have a couple of questions:
>1. Do you change the classification of highway on the motorway route
>into trunk through the city because it does not have a physical barrier
>in between (not restricted access) or do you keep it as motorway
>because of consistency?
>2. If we were to change the road classification several times during
>one route way, should we ignore segments that are less than 3km (for
>example motorway going through minor city in which it has a quality of
>3. Can motorway have some traffic signals when passing through city?
>4. How to classify State routes (for example in Melbourne)?
>Best regards,
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