A general methodology for fatigue reliability degradation of railroad wheels is proposed in this paper. Both fatigue crack initiation and crack propagation life are included in the proposed methodology using previously developed multiaxial fatigue models by the same authors. A response surface method in conjunction with design of experiments is used to develop a closed form approximation of the...

T H E AMENDMENTS to the Railroad Ret irement and Railroad Unemployment Insurance Acts, approved on July 31, 1 not only give railroad workers the most comprehensive system of social insurance i n the United States, i n terms of risks covered, but provide the first major, i f par t ia l , extension of the coverage of old-age and survivors insurance since the Social Security Act Amendments of 1939...

In this paper we will describe our experiences with modelling and simulating realistic railroad systems, based on component-oriented Petri Nets. Several libraries of railroad components are presented, including nets permitting the train to control the routers in the net. Petri Nets are translated into Maude in an automated way, and executed by the Maude interpreter. Since railroad models are la...

Abstract Ballast fouling in railroad substructure is detrimental to railroad track effectiveness and its structural capacity. Ground penetrating radar (GPR) provides a rapid, effective and continuous approach to assess railroad substructure condition. However, unknown ballast dielectric constant and unclear interface between clean and fouled ballast limit the GPR assessment accuracy. In this st...

BACKGROUND An association between diesel exhaust exposure and lung cancer mortality in a large retrospective cohort study of US railroad workers has previously been reported. However, specific information regarding cigarette smoking was unavailable. METHODS Birth cohort, age, job, and cause of death specific smoking histories from a companion case-control study were used to impute smoking beh...

A bridge approach, an essential component connecting a relatively rigid and more flexible track on subgrade soil, is one of the most common types transition zones. The tracks deck often undergo significantly lower deformations under loading compared to approach tracks. Even though there have been numerous efforts understand remediate performance deficiencies emerging from differences in stiffne...

PT KAI DAOP 5 Purwokerto is one of Indonesia's railroad operating units under the auspices Kereta Api Indonesia (Persero). has several divisions, which rail and bridge unit. The line at are still manually recording plan data inspecting tracks. So, a system needed to record review This done make it easier for inspection officers store reduce risk losing from Methods collection using literature s...

During 2000-2001, the U.S. Geological Survey (USGS), in cooperation with the Ocean Modeling and Prediction Division of the U.S. Naval Oceanographic Office (NAVOCEANO), constructed tidal gages at the East Pearl River at CSX Railroad near Claiborne, Mississippi, at the Rigolets at CSX Railroad near Rigolets, Louisiana, and at the Chef Menteur Pass at CSX Railroad at Chef Menteur, Louisiana, to co...

A field survey was begun in 1986 to determine the status of prairie vegetation on railroad rights-of-way in Wisconsin. Two % of 849 sample points located at 1.6 km intervals along railroads were found to contain relatively high quality prairie, and 23 % contained slightly degraded prairie. A significant proportion of these remnants contained mesic prairie, a community type which today is almost...

It is widely known that the railroad diesel locomotive engines emit significant amount of air pollutants. However, these engines are not equipped with any air pollutants reducing devices in Korea, resulting in the accumulative air pollution near the railroad. Because the pollutants emission from driving locomotive engines cannot be measured directly, the emission factors based on the amount of ...