[Tagging] Multi-value tagging and Lane Groups

[Colin Smale]

On 08/02/2012 21:03, Nathan Edgars II wrote:
> On 2/8/2012 2:25 PM, Martin Koppenhoefer wrote:
>> The lane-case is a little different though, because if you have
>> multiple values there (plus a definition from where to start) you
>> won't need lane numbering. For buildings you will have unambigous
>> numbers for the floors anyway, and they are the usual way to identify
>> levels in buildings, but nobody says "take lane 3".
>
> Actually they do :)
> http://www.dmv.ca.gov/pubs/hdbk/traffic_lanes.htm#choose_lane
> http://articles.latimes.com/1992-07-09/news/nc-2216_1_freeway-lane
> But, as with buildings, there's ambiguity - which side do you start on?
Nice to see the North Americans agreeing with us Brits on that one. Lane 
One is on the left!

Many roads with "lane differentiation" will be one-way (including dual 
carriageways) - that's the easy bit, just number them in a standard way, 
e.g. from "slow" to "fast" or left to right (independent of driving on 
left/right). On two-way roads, from left-to-right w.r.t. the direction 
of the way?

For building floors, are there any cultures which number their floors 
downwards?

Colin