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Rail Transit

SkyTrain: Moving from Reactive to Preventive Rail Maintenance Toward a State of Good Repair

April 1, 2025 | Filed under: Bob Tuzik, Noise and Vibration, Rail Grinding, Rail Transit

by Bob Tuzik This article was originally published in Mass Transit (February 2022). SkyTrain, Vancouver’s iconic rail transit system, is a system in motion. Since the opening of the original Expo Line, named and timed to coincide with Expo 86, SkyTrain, which moves more than 115 million commuters per year pre-covid, …

How Sound Transit Controls Train-Borne Noise

March 31, 2025 | Filed under: Bob Tuzik, Noise and Vibration, Rail Grinding, Rail Transit

by Bob Tuzik This article was originally published in Mass Transit (June 2023). Challenges abound in the design, construction, maintenance, and operation of light rail lines in urban areas. Chief among them is controlling track- and vehicle-born noise, an important part of maintaining the support of an agency’s various stakeholders, …

Wheel/Rail Profile Optimization on Wiener Linien’s Vienna Underground line U6

December 6, 2024 | Filed under: Rail Transit, Wheel/Rail Interaction, Wheel/Rail Profile, WRI Conference

by Jeff Tuzik One of the surest and most common signs that something is amiss at the wheel/rail interface is accelerated wear of the wheels, rail, or both. Occasionally the solution to the problem is straight-forward and site-specific. But more often, abnormal wear appears as a symptom of fundamental, systemic …

Stuart Grassie is the recipient of Wheel Rail Seminars’ 2024 Worth Award

June 21, 2024 | Filed under: Rail Transit, Wheel/Rail Interaction, WRI Conference

by Jeff Tuzik Stuart Grassie, Principal, Rail Measurement Ltd and Stuart Grassie Engineering Ltd, is the recipient of the 2024 Worth Award. The award, presented by Wheel Rail Seminars at the annual Wheel/Rail Interaction conference in May, is named for Art Worth, who was Manager of Standards and retired as …

An Introduction to Rail Grinding on the Delhi Metro

June 21, 2024 | Filed under: International, Rail Grinding, Rail Transit, WRI Conference

by Jeff Tuzik Rail transit properties around the world all contend with the same general issues. The corrugation on track in San Francisco is the same as corrugation on track in New Delhi. There may be a few different details, but the physics is constant. When it comes to addressing …

Sound Transit Studies Wheel/Rail Interaction Differences Between Vehicle Types

April 23, 2023 | Filed under: Rail Transit, Vehicle/Track, Wheel Maintenance, Wheel/Rail Interaction

by Jeff Tuzik Seattle’s Link Light Rail, operated by Sound Transit, is a fairly young system. And by most standards, a small system. But it’s also a sophisticated system, and it’s growing fast. The system currently operates 25 miles of track and is in the midst of expanding to 50 …

Examining Autonomous Track Geometry Testing and Instrumented Revenue Vehicle Technology

September 7, 2022 | Filed under: Friction Management, Measurement Systems, Noise and Vibration, Rail Transit, Wheel/Rail Interaction

A pair of speakers from different continents discuss the benefits of autonomous track geometry collection and the advantages of monitoring revenue-service vehicles’ response to track conditions in this first installment of topics covered at this year’s annual Wheel/Rail Interaction Conference in Vancouver, B.C., Canada. By Bob Tuzik Brad Kerchof wasted …

A First Look at Rail Milling in North America

February 27, 2020 | Filed under: Rail Maintenance, Rail Transit

By Richard Stock Rail Milling technology, which was introduced by Linsinger about 25 years ago, has been widely used in Europe, Asia, and Australia. It was recently introduced in North America. Unlike other maintenance technologies, rail milling is a non-abrasive cutting process where material is cut from the rail surface …

Rail Transit 2018: Quantifying Wheel/Rail Interaction and Managing Noise and Vibration

October 23, 2018 | Filed under: Noise and Vibration, Rail Transit, Wheel/Rail Interaction, Wheel/Rail Profile

By Bob Tuzik For three years running, New York City Transit and the Federal Transit Administration have kicked off the annual Wheel/Rail Interaction – Rail Transit conference with discussion of the NYCT/FTA research project to explore integrated wheel/rail analytics on MTA-NYCT’s No. 7 Flushing Line. It’s a fitting start to …

WRI 2017 – Transit: System Optimization and Better Asset Management

July 3, 2017 | Filed under: Rail Transit, Vehicle Design, Vehicle/Track, Wheel/Rail Interaction, Wheel/Rail Profile

By Jeff Tuzik Optimization, modernization and asset management are critical to the efficient running of a rail transit system. While each program is beneficial in its own right, the importance of asset management has taken on new significance with the recent Federal Transit Administration’s (FTA) rule making on the State …

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