[OSM-newbies] R: Speed Limits

[Fabrizio Carrai]

What Rally is saying is more than correct for the current level of
navigators. But thinking to an innovative navigator, the John's information
looks very interesting.
Exact time travel could be estimated using the correct speed limit available
at the road's usage time. But we could also think to something for evoluted:
the variation of the speed could be not only function of the time, but also
of the assesed traffic ondition (statistically or real time assessed).

I think that having tags supporting the John's data, could add an
interesting support to very advanced applications.

I'm a recent contibutor to the OSM project, and I would like to use this
thread to learn a bit more on the common idea to be used to add tags (and to
propose new ones..) to the ways.