Air pressure powered trains [1] exist in Jakarta [2] and in Porto Alegre [3] and they are currently mapped as railway=light_rail. The wiki [4] defines light_rail as "a higher-standard tram system," but these systems are in some respects a lower standard than tram: tracks must always be quite short due to inefficient air pressure energy transmission, and safety is lower (when braking and when resisting collisions) [5]. They also do not connect "the inner city with the surroundings" [4]. So I'm wondering if they should be mapped as railway=subway due to the lack of at-grade intersections with other types of traffic, or as railway=tram considering the standards of the technology despite not being directly accessible from streets. Passenger capacity (104 for the Jakarta train [5], up to 300 for the Porto Alegre train [6][7]) and travel speeds (65kmph [6] and 70kmph [8]) seem to be similar to both trams and light rail [10], so I don't think those aspects make any difference.
They are not narrow gauge, nor monorails like most people movers [9] in many airports. [1] https://en.wikipedia.org/wiki/Atmospheric_railway#Aeromovel [2] http://www.openstreetmap.org/way/121197926 [3] http://www.openstreetmap.org/way/217857315 [4] https://wiki.openstreetmap.org/wiki/Tag:railway%3Dlight_rail [5] (pt) https://www.sul21.com.br/jornal/aeromovel-aventura-ou-solucao/ [6] (pt) http://www.aeromovel.com.br/projeto/porto-alegre/ [7] https://en.wikipedia.org/wiki/Porto_Alegre_Metro#Airport_connection_people_mover [8] (pt) http://www.aeromovel.com.br/en/projeto/jakarta/ [9] https://en.wikipedia.org/wiki/People_mover [10] https://en.wikipedia.org/wiki/Light_rail -- Fernando Trebien +55 (51) 9962-5409 "Nullius in verba." _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
