Hazardous materials traffic originates and terminates at numerous different locations throughout the North American railroad network. Rerouting of this traffic, especially Toxic Inhalation Hazard materials, away from populated areas has received considerable attention in recent years as a means of reducing risk. However, rerouting on a route specific basis is neither simple nor necessarily effe...

The performance of many traffic control strategies depends on how much the traffic flow models have been accurately calibrated. One of the most applicable traffic flow model in traffic control and management is LWR or METANET model. Practically, key parameters in LWR model, including free flow speed and critical density, are parameterized using flow and speed measurements gathered by inductive ...

We study the sawtooth lattice of a coupled spin 1/2 Heisenberg system, a variant of the railroad trestle lattice. The ground state of this system is twofold degenerate with periodic boundary conditions and supports kink antikink excitations, which are distinct in this case, unlike the railroad trestle lattice. The resulting low temperature thermodynamics is compared with the recently discovered...

The benefit provisions and legislative history of the 1951 amendments to the Railroad Retirement Act were summarized in the February Bulletin. In this issue the Chief Actuary of the Social Security Administration discusses the financial and actuarial implications of the amended law, with special emphasis on the provisions coordinating in some measure the railroad program with old-age and surviv...