On Wed, Sep 19, 2018 at 7:09 AM Greg Troxel <g...@lexort.com> wrote: > Tod Fitch <t...@fitchdesign.com> writes: > > >> On Sep 18, 2018, at 6:19 PM, Joseph Eisenberg < > joseph.eisenb...@gmail.com> wrote: > >> > >> So on the boundary=administrative admin_level=6 for Rogers County, we > could have something like maxspeed:type:default=45mph > > > > Except that more typically there will be different default speed > > limits on each of the various OSM highway classifications. So maybe > > something more like “maxspeed:default:residential=25 mph”. > > I am not aware of *unposted* default limits in the US being different by > an entity smaller than state. In Massachusetts, there are default > limits in state statutes, in particularly 30 mph in "thickly settled" > areas (also defined in statute). Some towns have adopted 25 mph in > thickly settled areas, and they have signs at the town borders. >
Kansas and Oklahoma definitely do, often putting a specific default limit in their town's motor vehicle code. Tulsa does this, and it's in the top 1% largest of US cities. > It's an interesting question at what level to tag individual roads and > when to have some way of expressing rules and therefore to expect all > data consumers to evaluate the rules. My quick reaction is that > publishing rules for regions smaller than states is going to be too > messy, vs just tagging the ways. > Streamlines things, too, on the data consumer end. > In Mass, we have speed limit tags on almost all legal roads. To me, > that seems like the most straightforward approach, even if there are > also defaults. > I tend to agree, also makes it unambiguous where a smaller jurisdiction has a different default than the one it is inside of, especially if there's weirdness where the smaller jurisdiction is higher than the larger one for some reason. > If the general defaults are intended for routing, that seems more or > less ok. If they are intended to actually provide speed limit guidance > to drivers, I'm opposed, at least in jurisdictions where they aren't > strictly reliable. AFAICT, the only places that have huge, state-or-national default limits that don't get too messy to map as default on an area would be the EU, everywhere else doesn't seem to be anywhere near as organized on a large scale.
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