I somehow forgot to react on this one. 2012/3/5 Martin Koppenhoefer <[email protected]>: > Am 5. März 2012 12:08 schrieb LM_1 <[email protected]>: >> Currently the recommendation about separate mapping of directions >> seems to be the existence of a physical divider (wall, grass...). >> There is no problem if the divider is continuous and only has >> 'holes' in it to allow turning or lane changing during construction >> works. > > > when there are "holes" you will obviously have to split the divider > and keep the holes free. >
Sure, this question was not about dividers, but about the streets around. > >> If the divider is only a small object like tram platform, it does not >> seem right to divide the way and connect it afterwards. > > > why not? IMHO you should so exactly this. There are also similar > situations like subway entrances and pedestrian crossing islands where > the carriageway is split. > > Not, because it seems like the road is curved, while it is not (or very little). >> If this is mapped according to the recommendation the street would >> be between two rails (trams cannot change rails), which is not true. >> If each of the one way general traffic roads is mapped separately, >> it would seem that you cannot turn (you are not allowed to, but it is >> physically possible). > > > This whole "physically possible" field merits some further > considerations and discussions IMHO. First of all: physically possible > for whom? An old lady with a stick? A battle tank? A generic young > male acting as pedestrian? Possible with a vehicle with 2 axes 4 > metres long and 1.8 wide or one 18 metres long and 2.3 metres wide? > Would a cyclist dismantle and lift his bike over a small fence to > avoid 3 km of detour? Would you risk damaging the tyres of your car > (could still be "physically possible") or do you prefer not to? This > all depends on a lot of different factors. > In this case physically possible for all the examples you mentioned. The road has almost same surface quality across the whole width, the only thing that is stopping you is a white line. Adhering to the rules creates completely misleading results and ignoring them by tagging the current legal situation makes physically connected way look like a street with separated directions... > > For instance some time ago some mappers started to use > highway=footway, footway=sidewalk to map sidewalks with dedicated > osm-ways. This will in many cases actually lead to worse routing > results, as a destination just on the other side of the road will make > your router suggest to go via the next crossing (however far that > might be), instead of telling you that you have already arrived. > > > cheers, > Martin LM_1 _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk
