On Mon, 8 Mar 2021 at 15:36, Brendan Barnes <[email protected]> wrote:
> Hi all, > > When looking at Hume Freeway data lately, I notice a number of the sealed > links between the two carriageways are tagged as highway=motorway_link. Eg > https://www.openstreetmap.org/way/728917504/history. > > Reading the wiki, motorway_link is for the ramps connecting a motorway to > lower class highways. > > Further, checking OSC imagery (and driving past these links a lot), > signage says: No u-turn symbol: "Emergency & VicRoads Vehicles Excepted" in > Victoria. Similar Emergency/NRMA links exist in NSW, and I'm sure the other > states would have similar exemptions. > > I can't find Australian Tagging Guidelines on this specifically, so could > I get a general consensus on: > > 1) These links should change from highway=motorway_link to highway=service. > 2) Add emergency=designated to prevent routing issues. > 3) Is anything else, like motor_vehicle=permit, or a > restriction=no_right_turn / except=emergency required to be understood by > most routing engines? Or does emergency=designated suffice? > IMO they should be highway=service (though the emergency= and access= tags are most important here) emergency=designated access=no/private (per wiki =permit is where the permit is usually granted, if most people can't get a permit then =private is better) These access tags alone should suffice, but if you want you could add a restriction=no_u_turn (to map what's actually signposted as opposed to no_right_turn) with except=emergency.
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