On Sun, Oct 3, 2010 at 8:04 AM, Woll Newall <w...@2-islands.com> wrote: > We definitely need an "average speed" tag, to improve routing.
I very much disagree that this should be a tag. If it's going to be included, it should be in a separate table or set of tables. Hacking up a system to put average speed information into OSM using the current API and database structure would be horribly inefficient and/or not very useful. > We would need to: > 1) Tag the 'average' or 'typical speed' > 2) Associate those speeds with time of the day/week. > 3) Allow specification of different speeds/time for both directions of a way > (rush hour traffic is often only in one direction). > 4) Allow the mode of transport to be specified (e.g if there are bus lanes, > then buses would have a different speed to car stuck in rush hour traffic). You'd also need information about how the average speed was measured, when it was measured, how accurate it can be expected to be. When different people come up with different measurements using different methods, you have to have a method to choose one, or a way to include all of them. Really, I think it's a whole separate project, or at least a subproject. _______________________________________________ Tagging mailing list Tagging@openstreetmap.org http://lists.openstreetmap.org/listinfo/tagging
