2009/8/1 Renaud MICHEL <[email protected]>: > Le vendredi 31 juillet 2009 à 03:23, Roy Wallace a écrit : >> What about a way that has either a physical limitation or a legal >> limitation (not both). Perhaps there is some argument that the tag >> should differentiate between these situations? Though I admit I can >> only think of a weak one - that it makes it clearer for users and >> mappers > > I have a very good example: > For an ambulance, many legal limitations (like speed limit) don't apply, so > if a road has a legal limitation for the maximum height of 2m but you can > actually physically take that road with a 3m ambulance, that is a useful > information for the ambulance driver who then knows he can actually take > that road, although regular users may not.
This is a nice theory, but can I see some example? I doubt that there is any bridge with 3 m height and 2 m restriction. And I doubt that the ambulance driver would (in case of emergency) have the time and nerves to check if a bridge with 2m- restriction will still have enough space for him to pass. And I won't recommend him to rely on OSM data. Can you imagine what happens to him, if he gets stuck under a bridge with designated maxheight (and he's bigger) with an emergency patient on board? I don't neglect the usefullness of this tag though: there might be special transports (accompagnied by local police) that might pass (with special permission and controll) a bridge that legally is restricted e.g. to 2,80 but physically allows even 3,00 m to pass. They will even get rid of some air in their tires if it is needed ;-) cheers, Martin _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk
