Strange...my last response got deleted somehow. Anyway, in routing.xml, I find these entries:
select value="$maxspeed:practical" t="maxspeed:practical" select value="$maxspeed:advisory" t="maxspeed:advisory" select value="$maxspeed" t="maxspeed" I interpret those to mean that maxspeed:practical will get used if maxspeed:advisory and maxspeed aren't present, and that maxspeed:advisory will be used if maxspeed isn't present. I can't find maxspeed:typical anywhere in the file. More experienced OsmAnd users might be able to help. (Harry? Bart?) --jack On Friday, December 7, 2018 at 11:38:44 AM UTC-5, Greg Troxel wrote: > > Paul Johnson <[email protected] <javascript:>> writes: > > > On Fri, Dec 7, 2018, 09:27 Greg Troxel <[email protected] <javascript:> > wrote: > > > >> Paul Johnson <[email protected] <javascript:>> writes: > >> > >> I see maxspeed:typical as being for the flow of mixed traffic that is > >> being reasonable. > > > > Not sure this is a tag we even need in this case, since it can be > inferred > > automatically from the GPX database. > > I have been thinking of getting around to matching up GPX and OSM, but > more to add advisory/practical when it's out of whack with limits. But > perhaps the map building process could extract that. > > I gather that apple maps use the equivalent of real-time gpx from others > to inform routing. > > >> However, my specific example is a ramp where the advisory signs say 20 > >> mph but traffic is 99% of the time moving between 35mph (if there's a > >> cautious truck) and 50 mph (just cars, people familiar). The 20 signs > >> are because trucks going >50 keep rolling over, I think - which does > not > >> make sense. > >> > > > > Keep in mind in the US and Canada, the advisory speeds are meant for > > average family cars, trucks are advised to go slower. Not saying that > it's > > not always feasible to go faster than that, but it is the speed you're > > going to be able to traverse that section in a regular car on dry > pavement > > without having to make abrupt moves or brake hard either due to the > design > > of the road or typical traffic congestion. That said, Americans are > > aggressive drivers that typically take a much more aggressive approach > > than they're advised to, esp. in familiar areas... > > That is the theory, and I agree with it. I sort of see it as "what > speed can you travel the ramp and not exceed 0.4g lateral" or something > like that. > > Under that theory, the ramp in question would be 40, not 20, and the > other one would be 30 or even 25, not 35. They are just signed not > using the guidelines. > > > The tippy truck signs indicate to large vehicle drivers that they will > need > > to play on the side of extra caution because the location has been prone > to > > rollovers, the advised speed is still tuned to cars, however. > > In theory it is tuned to cars. It seems in this case that the trucks > kept tipping, and every crash - despite the trucks going clearly too > fast - they added more tippy truck signs and lowered the advisory speed. > So it's more like "if we post it 20 trucks might slow down to 40" in > this case. Which leads to MA drivers not believing that the advisory > speeds are appropriate. > -- 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
