3 ms·
Heh, yeah. Around floor 30 the noise is basically all gone. I don't know how some people live next to the subway though. That is super loud IMO
by deadmutex 5y ago
Heh, yeah. Around floor 30 the noise is basically all gone.
I don't know how some people live next to the subway though. That is super loud IMO
- ehnto 5y agoI lived next to a railway line, like it ran behind my back fence and it was a corner, so extremely screechy. I would constantly wake up to feeling like it had derailed right into my bedroom. Would not do again.
- hadlock 5y agoScreeching corner rails are solved by an automated rail greasing system. All train systems have these. If the rails are screeching, open a ticket with the local city system and have them fix the rail greasing system. Muni here was shut down for a long time and they forgot to turn back on the rail greasers and it sounded awful for a day before they were turned on/refilled.
- ehnto 5y agoIt was a commuter and transport line so the majority of the screeching came from the long transport trains in the middle of the night. I suspect those are run differently here in Australia. It happened for the entire three years I lived there so I imagine if it was just a mishap it would have been solved already.
- sokoloff 5y agoDoes greasing significantly impact braking performance?
- throwaheyy 5y agoThe grease is applied to the wheel flange on the outer rail of the curve, to minimise wear from the flange contacting the inside of the rail, which addresses some but not all screeching. Screeching can still occur because train wheels’ axles do not have a differential and one wheel travels a longer path than the other. The conical shape of the wheel profile deals with this, but some metal/metal creep between the wheels and the (ungreased top of the) rail still occurs