Seems like for route planning, the safe bet would be worst case scenario, lowest speed of the three possible maxspeed values. For example, a mountain road that (mostly motorcycle) traffic typically whips through curves at 70-90 km/h in a 110 km/h zone and have advisories (which are set assuming family cars in the US) for 40-50 km/h is probably only going to be traversable at about 30-40 km/h in a pickup.
On Fri, Dec 7, 2018, 09:01 Greg Troxel <g...@lexort.com wrote: > Jack Burke <burke...@gmail.com> writes: > > > OsmAnd does use maxspeed:advisory when just plain maxspeed=* is > > absent. Has used it for a while now. > > But what about when both are present? > > In the US, we have the situation where on ramps (link roads, slip roads) > the regulatory white sign will be the one from the highway (often 65 mph) > and > then there will be an advisory yellow sign saying something lower, > sometimes as low as 20 mph. > > Then there is maxspeed:typical. > > So it seems that it should use the first of > > maxspeed:typical > maxspeed:advisory > maxspeed > > that is present, but it sounds like you are saying that osmand only > uses maxspeed:advisory when plain maxspeed is missing. > > > The real question for routing is "at what speed can we expect that a > reasonable driver will traverse whis segment". That's why I put typical > first. There is a ramp near me where (reality, not sure of todays' > tagging) > > maxspeed:typical= 40 mph > maspeeed:advisory= 20 mph > maxspeed= 65 mph > > I realize it varies from country to country, but in many parts of the US > the relationship between regulation and reality is quite off. Having > driven in the UK, I can realize how this would seem very strange to UK > drivers who have not experienced the US outside of large cities. > > -- > You received this message because you are subscribed to the Google Groups > "Osmand" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to osmand+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Osmand" group. To unsubscribe from this group and stop receiving emails from it, send an email to osmand+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
