[OSM-talk] Divided roads proposal

[Anthony]

On Sun, Dec 6, 2009 at 4:16 PM, Steve Bennett <stevagewp at gmail.com> wrote:

> Example:
>
> http://www.openstreetmap.org/?lat=-37.820693&lon=144.919989&zoom=18&layers=B000FTF
>
> This looks right to you?
>

I think it could be rendered better, especially if there is width
information provided, but I think it's mapped right, or at least the best it
can be mapped without using areas for everything.

That said, if you only limited your proposal to roads like this where there
is essentially no routing information contained in the divider data, I won't
oppose it.

On Sun, Dec 6, 2009 at 3:56 PM, Steve Bennett <stevagewp at gmail.com> wrote:

> Yahoo — now that I look — does exactly what I'm proposing, rendering a
> single road with a dotted line down the middle to indicate the division.
>

Yahoo seems to be indicating a center turning lane with that rendering, not
a physical divider.  They happen to also be mapping those small physical
dividers that way, but I suspect that's out of lazy mapping rather than
anything else.


> I think it is essential that slipways are mapped. ESPECIALLY when one is
>> trying
>> to add the right routing instructions. TomTom has started showing motorway
>> and
>> major road slipway details properly. You need to know when to get to an
>> inside
>> lane and take a slip road PRIOR to the actual junction.
>
>
> Maybe we should be mapping slipways, hopefully there's a better approach
> than marking them all as fully fledged roads though.
>

I think now is a good time to bring up the rule against using the word
"road" on this mailing list.

To put it more clearly, ways do not have a one to one correspondence with
roads.  They never have.
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