[Tagging] Residential roads

[Colin Smale]

  On 02/10/2010 02:07, M∡rtin Koppenhoefer wrote:
> 2010/9/30 Colin Smale<colin.smale at xs4all.nl>:
>> Also important for routing systems is the "practical speed" for a road.
>> Many country roads may have a high legal limit, but for reasons including
>> width and curviness you may never achieve anywhere near that in practice.
>
> this depends on the vehicle and the expertise of the driver...
>
Absolutely, and many other factors as well. But the point is that it has 
no relation to the legal maximum speed, which is the current definition 
of the maxspeed tag except that maxspeed should probably be the upper 
limit of the speed assumed by routing programs. The fact that a "speed 
for routing purposes" cannot be fairly expressed as a single figure is 
no reason to deny its importance. If it is not explicitly contained in 
the data, it might be derivable somehow, but even that will depend on 
the presence of certain base data.