February_2022 - 17

Vancouver, B.C.
looking at how to make that more
efficient and more responsive. "
Toward that end, SkyTrain
is currently planning to replace
its in-house grinders. Increased
in-house capacity will enable
BCRTC to advance its preventative
grind program and balance
grinding capacity with future line
extensions on the horizon.
Noise: A condition
indicator
With the rail surface condition
well in hand, BCRTC was able
to direct energy and resources
toward another high-priority,
high-profile issue - one that all
rail transit systems face to varying
degrees: noise. Specifically, wheel/
rail-generated noise.
As a system that operates primarily
on an elevated guideway
near businesses and densely populated
residential communities in
Vancouver's packed urban environment,
noise is a genuine problem.
And controlling it is a real
challenge. But having successfully
addressed one formidable challenge,
the BCRTC engineering/
maintenance team rolled up their
sleeves to tackle another.
" Arresting wear and degradation
was our problem, but we've
moved beyond that, " Doyle said.
" Noise is now our priority. "
" We don't just want to mask
noise or put a band-aid on the
problem, " Vesik added. " We want
to address the root cause. "
BCRTC determined that addressing
- and ultimately reducing
- wheel/rail-generated
noise, which can exceed 90 decibels
(dBA) on some parts the system,
would not only benefit riders
and neighbors near the tracks, it
could also serve as a bellwether
of improving or degrading track
conditions, since noise can be an
indicator of track condition.
" Although noise isn't necessarily
a direct indicator of poor
condition, we can use noise and
impact vibration to home in on
locations that may require maintenance, "
Vesik said. " We can also
look at the assets in these locations
to see if we need to improve the
materials, like using harder rail
or a friction modifier, to reduce
corrugation and increase the interval
required for maintenance. "
While viewing asset management
through a noise lens can be
effective from a maintenance perspective,
it also makes sense from
a business perspective, Vesik says.
" Controlling noise helps improve
the state of good repair
and extends asset
life. Looked
at the other way, improving the
state of good repair will likely
improve ride quality and reduce
noise and the number of residents'
complaints, " he explained.
" If we can control the noise to
acceptable levels, " Doyle added,
" we can be confident that the system
is in a state of good repair. "
Since SkyTrain is not regulated
by the U.S. Federal Transit Administration,
BCRTC refers to a
state of good repair as an engineering
standard, rather than a
legal or regulatory standard.
" Our goal is 100 percent asset
performance when performing
scheduled maintenance and being
able to predict the end of the
useful life of an asset and having
a plan to replace it, " Vesik said.
With that in mind, TransLink
commissioned a study in 2018
to assess noise on the SkyTrain
system and recommend ways to
deal with it. The initial report
recommended looking into the
feasibility and effectiveness of six
noise-mitigation measures:
* Improvements to switch maintenance
practices
* Investigation of harder rail steel
* Re-introduction of friction modifiers
to improve long-term rail
condition
* Improvements to rail grinding
practices
* Installation of rail dampers to reduce
noise radiated from the rails
* Development of guidelines for
new residential developments
near SkyTrain
TransLink
GRINDING FACETS on a freshly ground rail. Marking
on the rail indicates the future contact patch for
reference by the Corrugation Analyzer Trolley.
FEBRUARY 2022 | MassTransitmag.com | Mass Transit | 17
TransLink
RAIL DAMPERS installed in areas prone to corrugation
have been shown to reduce noise by up to six dBA.
Jack Lindquist
A PROFILE template is used to determine how
closely the rail profile matches the target profile.
http://www.MassTransitmag.com

February_2022

Table of Contents for the Digital Edition of February_2022

Editor’s Notebook
People & Places
SkyTrain
Bolstering the Mobility Toolbox
2022 Mobility Outlook
Outfitting Networks with Improved Connectivity to Create a Better Rider Experience
Products
February_2022 - 1
February_2022 - 2
February_2022 - 3
February_2022 - 4
February_2022 - 5
February_2022 - Editor’s Notebook
February_2022 - 7
February_2022 - People & Places
February_2022 - 9
February_2022 - 10
February_2022 - 11
February_2022 - SkyTrain
February_2022 - 13
February_2022 - 14
February_2022 - 15
February_2022 - 16
February_2022 - 17
February_2022 - 18
February_2022 - 19
February_2022 - Bolstering the Mobility Toolbox
February_2022 - 21
February_2022 - 22
February_2022 - 23
February_2022 - 24
February_2022 - 25
February_2022 - 2022 Mobility Outlook
February_2022 - 27
February_2022 - 28
February_2022 - 29
February_2022 - Outfitting Networks with Improved Connectivity to Create a Better Rider Experience
February_2022 - 31
February_2022 - 32
February_2022 - Products
February_2022 - 34
February_2022 - 35
February_2022 - 36
https://www.nxtbook.com/endeavor/masstransit/september-october-2022
https://www.nxtbook.com/endeavor/masstransit/july-august-2022
https://www.nxtbook.com/endeavor/masstransit/june_2022
https://www.nxtbook.com/endeavor/masstransit/april-may_2022
https://www.nxtbook.com/endeavor/masstransit/march_2022
https://www.nxtbook.com/endeavor/masstransit/february_2022
https://www.nxtbook.com/endeavor/masstransit/at-the-show-2021
https://www.nxtbook.com/endeavor/masstransit/december-2021-january-2022
https://www.nxtbook.com/endeavor/masstransit/november-2021
https://www.nxtbook.com/endeavor/masstransit/september-october_2021
https://www.nxtbook.com/endeavor/masstransit/july-august_2021
https://www.nxtbook.com/endeavor/masstransit/mass_transit_june_2021
https://www.nxtbook.com/endeavor/masstransit/aprilmay2021
https://www.nxtbook.com/endeavor/masstransit/december2020january2021
https://www.nxtbook.com/endeavor/masstransit/november2020
https://www.nxtbook.com/endeavor/masstransit/septemberoctober2020
https://www.nxtbook.com/endeavor/masstransit/julyaugust2020
https://www.nxtbook.com/endeavor/masstransit/june2020
https://www.nxtbook.com/endeavor/masstransit/aprilmay2020
https://www.nxtbook.com/endeavor/masstransit/Mass_Transit_March_2020
https://www.nxtbook.com/endeavor/masstransit/february2020
https://www.nxtbook.com/endeavor/masstransit/december2019january2020
https://www.nxtbook.com/endeavor/masstransit/november2019
https://www.nxtbook.com/endeavor/masstransit/Mass_Transit_September_2019
https://www.nxtbook.com/endeavor/masstransit/julyaugust2019
https://www.nxtbook.com/endeavor/masstransit/2019railproductguide
https://www.nxtbook.com/endeavor/masstransit/june2019
https://www.nxtbook.com/endeavor/masstransit/2019busandparatransitproductguide
https://www.nxtbook.com/endeavor/masstransit/aprilmay2019
https://www.nxtbook.com/endeavor/masstransit/march2019
https://www.nxtbook.com/endeavor/masstransit/february2019
https://www.nxtbookmedia.com