[OSM-talk] traffic signals at dual-carriageway and complicated intersections

Brent Easton b.easton at exemail.com.au
Wed Aug 1 08:01:26 BST 2007

Sounds good to me. I agree, simplicity is best. 

I don't see any problem with more complex intersections, All parts of ways that pass through the intersection and are controlled by the same 'set' of lights would be made part of a single way with

 highway=<highest rated highway entering the intersection>

The junction 'way' cannot be ordered as you will need to retain the correct oneway tags for each section. This should not be a problem as it will never be rendered as an area, but as highway.

Let's add it this to the Proposed Features page for discussion there - I'm not sure yet of the procedure for the whole voting thing.

*********** REPLY SEPARATOR  ***********

On 1/08/2007 at 3:48 PM Lachlan Rogers  wrote:

>I think this is quite a good suggestion.  It would certainly work for the
>case where two dual-carriage way roads intersect.  I wonder if there are
>more complicated situations, and if so I wonder how this technique would
>I do think that this is better than having an "invisible" way marking the
>intersection square on top of the road ways.
>- Lachlan
>On 8/1/07, Cameron Patrick <cameron at patrick.wattle.id.au> wrote:
>> Lachlan Rogers wrote:
>> > I really like this suggestion.  However, what should be done when two
>> > intersecting roads are dual-carriageway and different highway types. 
>> > this case the middle square of the intersection would have two sides of
>> a
>> > particular type and the other two sides a different type.
>> The convention for junction=roundabout is to use the 'most major'
>> highway type for the junction way.  It would seem sensible to apply this
>> to traffic lights as well.
>> Cameron
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Brent Easton                       
University of Western Sydney                                   
Email: b.easton at uws.edu.au

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