We present a new model for a strategic locomotive scheduling problem arising at the Deutsche Bahn AG. The model is based on a multi-commodity min-cost flow formulation that is also used for public bus scheduling problems. However, several new aspects have to be additionally taken into account, such as cyclic departures of the trains, time windows on starting and arrival times, network-load depe...

This article explores issues related to the friction of brake pads a freight car. The coefficients composite and cast-iron new type, calculated for range different speeds, specific braking force during emergency are given. A sectional block car locomotive has been developed. advantages have scientifically substantiated. obtained calculations allow us recommend them further study implementation ...

total VKT (2). In developed countries, freight road transport continues to grow at a faster rate than the gross domestic product (3). This growth in commercial vehicle activity is increasing preexisting concerns over the associated negative externalities of urban freight movements. These externalities include greenhouse gases, air pollution, safety, and congestion and have been estimated to be ...

Demand for freight transport is ever increasing. This demand in the European Union (EU) countries has increased about 3 times during the last three decades. Relatively, the same trend has been reported for the Netherlands. Motorways have a more important role in the road freight transport than other categories of roads. Now, they carry about 40 % of all vehicle-kilometers (CBS). The length of t...

A numerical model based on Lagrange-D’Alembert principle is proposed for car-to-car end impact in this paper. In the numerical model, the friction forces are treated by using local linearization model when solving the differential equations. A computer program has been developed for the numerical model based on Runge-Kutta fourth-order method. The results are compared with the Multibody Dynamic...

In rail freight operation, freight cars need to be separated and reformed into new trains at hump yards. The classification procedure is complex and hump yards constitute bottlenecks in the rail freight network, often causing outbound trains to be delayed. One of the problems is that planning for the allocation of tracks at hump yards is difficult, given that the planner has limited resources (...

Faced with procuring transportation over its freight network, a shipper can either bid out all of its lanes at once, or somehow divide up the network and bid it out in pieces. For large shippers, practical concerns such as attendant manpower requirements and exposure to financial/operational risks can make the former undesirable or even infeasible. Such a shipper therefore needs to determine ho...

Transport corridors are receiving a growing level of attention, particularly with the surge of containerized maritime freight and the setting of more efficient time and costwise freight distribution systems. Global commodity chains, with a strong Pacific Asian component and controlled by large modal and intermodal freight operators, have become an operational reality. Particularly, the role of ...