[HN Gopher] Detrimental Decibels: A Study of Noise Levels in Van...
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Detrimental Decibels: A Study of Noise Levels in Vancouver's
SkyTrain System
Author : luu
Score : 16 points
Date : 2025-01-13 09:49 UTC (13 hours ago)
(HTM) web link (open.library.ubc.ca)
(TXT) w3m dump (open.library.ubc.ca)
| Anechoic wrote:
| The paper basically reinforces one of the tenets of transit noise
| and vibration analyses: if you don't maintain your system
| (specifically wheels and rails in the case of noise), things tend
| to get louder over time. BCRTC knows this [0] and they're working
| on it. As with all things, it's about time and money, but they
| are trying to be proactive with vehicle and track maintenance via
| rail grinding and complaint tracking.
|
| [0] https://archive.wheel-rail-seminars.com/archives/2022/rt-
| pap...
| guardiangod wrote:
| The rail grinding noise of those Mark 1 Skytrain cars are really
| something. They literally made my ears hurt. For reference New
| York's subway rail noise never made my ears hurt that much.
|
| The explanation I read online is that Translink (the transport
| authority) lost one of the 2 rail grinders they contracted, and
| had to buy a grinder for use. So for a few years, while waiting
| for the grinder to arrive, the rails were not getting the regular
| grinding needed that'd lessen the wheels-on-rail noise.
|
| An unverified rumor I heard was that Translink cheaped out and
| bought a batch of substandard rails that are softer than needed.
| This means the rails wear out and become out of spec faster. The
| issue was compounded by the fact that the softer rails were used
| to replace a large portions of routes with sharp curves.
|
| The rolling stocks use linear induction propulsion, which means
| there is no electric motor on the train. The trains are very
| light as a result and require different maintenance.
| xattt wrote:
| > LIM
|
| The downside to LIMs is that they have ann unexpected
| derailment/failure mode (1), as manifested by the 2023 SRT
| derailment.
|
| Briefly, the magnetic repulsion/attraction forces of an
| accelerating train caused a section of the reaction rail to
| catch on the train, which catapulted a train car.
|
| I used to live near the SRT and those trains got louder and
| louder with age.
|
| (1) https://stevemunro.ca/2024/01/31/the-scarborough-rt-
| derailme...
| bedobi wrote:
| London Underground destroys all other transit on the planet when
| it comes to noise, and ironically, it's not even the trains
| themselves, it's the effing speakers
|
| MIND THE GAP
|
| louder than an Iron Maiden concert, it's unbearable and
| unnecessary, no idea why they don't turn that shit down
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(page generated 2025-01-13 23:00 UTC)