I have not heard of “whispering asphalt” but I know that in some areas of the state I live in they have been using a porous asphalt on roads to provide better traction during rain storms.
So I am not sure if the current uses of “asphalt:type=porous” would be to indicate pavement designed for good traction in the rain or if it was for making a less noisy road. From taginfo, it looks like asphalt:type has only been used a few times and always with the value of porous. And it looks like they are all in the one area you found with your overpass query. Perhaps the original mapper could be contacted to see what they were trying to describe. Cheers! Tod > On May 2, 2019, at 12:55 PM, amilopow...@u-cloud.ch wrote: > > Signed PGP part > Hello > > I used to live in Fribourg, Switzerland where they put "whispering asphalt" > on one of the main roads in order to prevent noise. You can barely hear an EV > now, but that is another story. > > Since we have quite a lot of discussions about noise pollution I thought it > might be a good idea to implement a tag for that. > > surface=whispering_asphalt or surface=silent_asphalt came to my mind but I > don't know what the official term for that aspahlt in English is. In German > we call it "Flüsterbelag" or "Flüsterasphalt". > > Then I found on Overpass-Turbo someone that tagged "asphalt:type=porous". [1] > Since I don't work in that area I don't know for sure if this is the same > thing as I imagine and I found only one Wikipedia article in German [2] about > that asphalt I mean. > > I personally prefer one of my first ideas, since I hate to add another > key/value if I can say it in one. > > I look forward to hear your thoughts and comments. > > Regards > Ueli (amilopowers) > > > [1] https://overpass-turbo.eu/s/Iky <https://overpass-turbo.eu/s/Iky> (click > "run") > [2] https://de.wikipedia.org/wiki/Asphalt#Offenporiger_Asphalt > <https://de.wikipedia.org/wiki/Asphalt#Offenporiger_Asphalt> > > ---- > Sent from ProtonMail <https://protonmail.ch/>, encrypted email based in > Switzerland. > > > >
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