On Thu, Sep 30, 2010 at 8:15 AM, Richard Welty <rwe...@averillpark.net> wrote: > On 9/30/10 7:38 AM, Colin Smale wrote: >> 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. > > i have at times wanted this, when i've seen a road that was defaulted to > 55mph > but wasn't practical to travel at more than 40 due to broken pavement, for > example.
For curves the government uses a "ball bank indicator" to measure the safe speed (which then goes on advisory speed limit signs). But I don't know of any defined method of giving a comfortable speed for rough pavement. There are some brick roads around here than are hell at any speed (especially on a bike, despite being signed bike routes...). _______________________________________________ Tagging mailing list Tagging@openstreetmap.org http://lists.openstreetmap.org/listinfo/tagging
