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Wheel/Rail Interaction

Managing Slack in Trains with Cars Equipped with Hydraulic End-of-Car-Cushioning Devices

July 24, 2023 | Filed under: Wheel/Rail Interaction

by Jeff Tuzik Among the most significant forces that freight railroads contend with in daily operations are buff and draft (or compressive and tensile) forces between cars within train consists. These forces are mediated by various damping technologies, braking and acceleration practices, and by train make-up. When these forces aren’t …

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 …

Joe Kalousec (left) and Gordon Bachinsky (right)

Steel Hardness and Wear at the Wheel/Rail Interface: Perception vs Reality

February 6, 2023 | Filed under: Heavy Haul, Rail Maintenance, Wheel/Rail Interaction

By Jeff Tuzik Railroads around the world have many standards for wheel and rail hardness, with varied theories regarding the interaction of harder and softer steels. And while it is intuitively apparent that harder materials should wear less, last longer and generally provide a net benefit to systemic resilience, the …

Maintenance Optimization and The State of Good Repair

December 16, 2022 | Filed under: Wheel/Rail Interaction

By Jeff Tuzik The State of Good Repair is a goal, but it’s also a process. It’s achieved through a series of instruments and instrumental decisions that aim to report on the health of a system from the most granular component level, to the broadest holistic overview. This Part 2 …

The Tools of Remediation: Case Studies on Mitigating Common Concerns at the Wheel/Rail Interface.

September 15, 2022 | Filed under: Friction Management, Maintenance, Noise and Vibration, Wheel/Rail Interaction

by Jeff Tuzik Transit systems around the world, despite their differences, all contend with the same issues to some degree. Issues like vehicle- and ground-borne vibrations, excess noise, and timetable delays often rise in priority as they generate increasing numbers of complaints. These issues are often symptoms that can be …

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 …

“The Complete Field Guide to Modern Derailment Investigation:” An insiders’ look into the definitive work by the industry’s preeminent derailment investigator.

April 27, 2021 | Filed under: Gary Wolf, Wheel/Rail Interaction

by Bob Tuzik, Executive Program Director – Wheel Rail Seminars If there are lessons to be learned from a derailment — and, of course, there are — then Gary Wolf’s The Complete Field Guide to Modern Derailment Investigation is a master class on finding, analyzing, and understanding the marks on …

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 – Heavy Haul: Condition Monitoring at the Component Level

February 19, 2018 | Filed under: Wheel/Rail Interaction

By Jeff Tuzik   The railroad is a system. The holistic approach is the optimal approach. This is a maxim often repeated at the Wheel Rail Interaction (WRI) conference, and at railroads around the world. It’s a simple concept but it belies great complexity. At WRI 2017, a number of …

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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