On Oct 16, 2013, at 8:38 PM, Martijn van Exel wrote: > We just had an interesting discussion about ferry routing here at Telenav. > > In our testing we see that we sometimes fail to route folks over car > ferries, even if that would be the preferred route and alternatives > would be much, much longer. > > It turns out that this happens because some of the access roads to > these ferries are tagged as highway=service, sometimes > service=driveway. For various reasons we don't want to route folks > through service roads, so this poses a challenge. Here's an example: > http://www.openstreetmap.org/#map=19/48.42169/-123.37231 > > As a lightweight solution, we came up with this idea: why don't we tag > service roads that lead to and from a ferry as access=ferry. The > access= qualifier is already common on service roads, because of the > nature of highway=service as a road that generally provides access to > some particular destination. > > This is not going to be affecting a huge number of ways - there are > only around 500 or so ways tagged with route=ferry, of those, only a > minority are car ferries, and of those, only a small amount would have > only service roads connected to them. I can figure out how many > exactly if you're interested. > > I am curious to hear your thoughts. > > -- > Martijn van Exel > OSM data specialist > Telenav > http://www.osm.org/user/mvexel > http://wiki.openstreetmap.org/wiki/User:Mvexel > http://hdyc.neis-one.org/?mvexel
Seems like access=* is and should be for who can use a facility (residents, law enforcement, etc.) while the service=* is a descriptive modifier on what a highway=service was built for. So I would suggest something like highway=service, service=ferry_access. On the off chance that the ferry route has some access restrictions then the access key would still be available for its normal use. I see there is already one service=Ferry_ramp and 49 service=passenger_ferry though I haven't checked to see if that was used on the ferry route itself rather than on the service road(s) leading to it. Cheers, Tod _______________________________________________ Talk-us mailing list Talk-us@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-us
