[Tagging] usage of maxspeed:practical is described as recommended on wiki

[Martin Koppenhoefer]

> Il giorno 23/ago/2014, alle ore 21:08, Ilpo Järvinen <ilpo.jarvinen at helsinki.fi> ha scritto:
> 
> How much of such ways that would be a candidate for maxspeed:practical


IMHO this is a highly subjective tag that depends heavily on your driving ability and the vehicle and driving comfort you expect. E.g. a moderately modern battle tank can drive 70-90km/h on an open field with no road at all ;-)

As we are generally rejecting subjective tagging like suitability and the like, this practical speed tag does not fit well in our system

cheers,
Martin