[Tagging] Atmospheric railways: the aeromovel of Jarkarta and Porto Alegre

[Fernando Trebien]

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."