To determine the employment characteristics of workers covered jointly by old-age and survivors insurance and the railroad retirement program, a sample of the work histories from the Bureau of Old-Age and Survivors Insurance and the Railroad Retirement Board has been analyzed. In the analysis the hypothesis has been developed that, as time progresses, virtually all railroad workers will at some...

An important factor in an efficient operation of freight railroad companies is their ability to obtain routes and schedules that improve rail network capacity utilization. In this paper we present a decision tool to aid train planners obtain quickly good quality routes and schedules for short time horizons (e.g., daily) to better manage the limited track capacity available for train movements. ...

In the Los Angeles/Long Beach (LA/LB) port complex, the empty containers are handled twice:once they are recycled from importers and the second time they are trucked to exporters. Clearlya system is needed to facilitate the interchange of empties outside the ports, to reduce the trafficcongestion and emissions around the ports. In this paper, the deterministic and stochastic emp...

This paper considers the effect of train speed on railroad hazardous materials transportation risk. A statistical method was developed to estimate the speed-dependent conditional probability of release (CPR) of tank cars involved in accidents with the objective of assessing its effect on risk analysis results. A case study of a representative hazardous materials route was conducted in which ris...

The settlement of track in a railroad underpass project was studied by theoretical analysis and numerical simulation, based on the model winkle beam elastic foundation. Taking roadbed as nonlinear boundary condition, control differential equation large deformation established solved Fourier series method; solution obtained establishing an actual compared analyzed with cosine function solution. ...

An important factor in an efficient operation of freight railroad companies is their ability to obtain routes and schedules that improve rail network capacity utilization. In this paper we present a decision tool to aid train planners obtain quickly good quality routes and schedules for short time horizons (e.g., daily) to better manage the limited track capacity available for train movements. ...

This paper addresses the determinants of three types of railroad related fatalities: trespasser fatalities, those at grade crossings, and those involving passengers and employees. Of particular interest are the effects of railroad deregulation (the Staggers Act) on railroad related fatalities. Models are developed using specification error analysis and seemingly unrelated regression. Deregulati...

This is a review of walking tasks in the railroad environment, and the injuries that result from slips, trips, falls, or other acute or even non-traumatic exposures. The lack of federal regulations for railroad walkways has led several states to develop and enforce their own regulations. Support from the research literature for such regulations has come from biomechanical studies of the effects...

We propose a robust droplet fusion and sorting method for two parallel trains of droplets that is relatively insensitive to frequency and phase mismatch. Conventional methods of droplet fusion require an extremely precise control of aqueous/oil flows for perfect frequency matching between two trains of droplets. In this work, by combining our previous two methods (i.e., droplet synchronization ...