[OSM-talk] Should Bridges be independent of their ways?

[John Smith]

2009/9/21 Anthony <osm at inbox.org>:

> I'd love for you to be able to do it.  Come up with a way to do it that
> doesn't require rewriting all the editors, all the routing software, and
> combining multiple ways into single ways, and we can both be happy.

So you are telling me that the editors, the OSM protocol and OSM DB
schema has always been static and never changed from the begining?

> Give me an exact situation, and give me your exact proposed solution.

You'd probably need some tag similar to shop open hours, but in this
case would determine the flow of traffic.

> If we're talking about the Walt Whitman Bridge, with its "zipper barrier"
> (http://www.phillyroads.com/crossings/walt-whitman/img12.gif), it could be
> represented presently as four ways, two in each direction, with time
> restrictions so that at any time only two ways are open.

I was talking about the Sydney Harbour bridge, it has 1 pedestrian
lane, 1 cycle lane, 1 bus lane, 2 railway "lanes" and 8 traffic lanes,
during peak hours there is 6 lanes one way and 2 lanes the other,
outside of peak times it's 4 lanes each way.

However it's only one physical bridge but with 13 lanes.

With some kind of spatial tagging you could tag a lane with a time and
which direction it was allowed and potentially a default if it doesn't
change or if it's outside peak hours.

<snip>

I'm sorry, a single physical bridge, with multiple lanes not multiple ways.

> If you disagree with that last one, then you're proposing to undo a whole lot of work that people have done.

Again, the OSM system was perfect from the start and nothing has ever
changed since because it was so perfect.