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Track Geometry

Rail Cant Measurement of Concrete Crossties (Part 1 of 2)

January 4, 2014 | Filed under: Measurement Systems, Rail Cant, Track Geometry

By Arthur Clouse • October, 2008 In response to accidents, unregulated causal factors and the National Transportation Safety Board’s recommendation (NTSB R-06-19), the Federal Railroad Administration (FRA) Office of Safety together with the Office of Research and Development initiated a study to identify and evaluate the safety of concrete crossties. …

Curve Superelevation: Problems and Solutions

January 3, 2014 | Filed under: Gary Wolf, Rail Maintenance, Track Geometry, Vehicle/Track

By Gary Wolf • January, 2006 Railroad engineering managers have been struggling with the problem of how much elevation to place in a curve since the first steam engines started turning a wheel. While the physics and calculus of the matter seem straightforward, the application of those formulas is where problems …

FRA Initiatives: Dr. Magdy El-Sibaie, Chief of FRA’s Track Research Division

January 3, 2014 | Filed under: Maintenance, Measurement Systems, Track Geometry, Vehicle/Track

By Bob Tuzik • May 26, 2005 The Federal Railroad Administration’s Office of Research and Development is not the best known R&D organization in the industry, but it is one of the most important. It’s work figures prominently in rulemaking and the regulatory process for the industry. That role is …

Rock ’til You Drop: Starting and Stopping Harmonic Rock and Roll

January 3, 2014 | Filed under: Gary Wolf, Rail Maintenance, Track Geometry, Vehicle/Track

By Gary Wolf • February 1, 2005 It’s said that “it takes two to tango,” but it takes three critical elements to induce harmonic rock and roll: Like many of the other legendary “rockers,” freight car rock and roll came to the forefront in the ‘70s. The introduction of high-center-of-gravity, 100-ton …

Effects of Wide Gauge on Derailment Potential (Part 2 of 2)

January 3, 2014 | Filed under: Rail Maintenance, Track Geometry, Vehicle/Track

By Gary P. Wolf • January 1, 2005 Part 1 of “Effects of Wide Gauge on Derailment Potential” examined how wide gauge occurs, some of the symptoms and reasons why wide gauge is undesirable. Part 2 of this article explores how to correctly measure gauge and properly identify wide gauge …

Effects of Wide Gauge on Derailment Potential (Part 1 of 2)

January 3, 2014 | Filed under: Rail Maintenance, Track Geometry, Vehicle/Track

By Gary P. Wolf • December 1, 2004 “Wide gauge” is one of the most often used FRA derailment codes. In 2003, 254 derailments were reported to have been caused by wide gauge (FRA code T110 or T111). This represents nearly 13% of all derailments reported to the FRA, and roughly …

Engineering the Wheel/Rail Interface for Rail Transit

October 18, 2013 | Filed under: Rail Transit, Track Geometry, Vehicle Design, Vehicle/Track, Wheel/Rail Interaction

By Jeff Tuzik • July 2010 Wheel/rail interaction is complex, variable and difficult to manage — especially on rail transit systems where noise, vibration and ride quality present daily challenges. As a result, managing the wheel/rail interface requires constant attention and innovation. Speakers at Advanced Rail Management’s Rail Transit 2010 …

Friction Management and Curve Elevation

October 13, 2013 | Filed under: Friction Management, Track Geometry

By Mike Gilliam and Russell Rohlf • October 2010 Optimizing friction management is an ongoing project on Union Pacific. Gauge-face (GF) lubrication is a long-standing program, but it requires an additional 400 units to reach optimum efficiency. A large number of top-of-rail (TOR) units are needed, as well, as UP is only beginning …

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