Ontario Ministry of Transportation

About: Ontario Ministry of Transportation is a government organization based out in Toronto, Ontario, Canada. It is known for research contribution in the topics: Poison control & Asphalt. The organization has 4652 authors who have published 3882 publications receiving 59011 citations.

Inter-city bus scheduling for allied carriers

Abstract: Inter-city bus carriers have increasingly entered into alliances with other carriers as a means of forming complete networks and improving operation efficiency. Vehicle fleet routing and timetable setting are not only important in inter-city bus carrier operations, but are also related to alliance effects. The setting of a good timetable cannot only enhance the allied inter-city bus carriers’ operating performance, but also be a useful reference for alliance decision-making. In this research, we develop several coordinated scheduling models by combining vehicle fleet routing and timetable setting. To evaluate the models, we perform a case study using real operating data from two Taiwan inter-city bus carriers. The preliminary results are good, showing that the models could be useful for inter-city bus carrier's alliances.

Non-hydrostatic versus hydrostatic modelings of free surface flows

Abstract: The hydrodynamics of geophysical flows in oceanic shelves, estuaries, and rivers are often studied by solving shallow water equations under either hydrostatic or non-hydrostatic assumptions. Although the hydrostatic models are quite accurate and cost-efficient for many practical applications, there are situations when the fully hydrodynamic models are preferred despite a larger cost for computations. The present numerical model is implemented by the finite volume method (FVM) based on unstructured grids. The model can be efficiently switched between hydrostatic and non-hydrostatic modules. The case study shows that for waves pro-pagating along the bar a criterion with respect to the shallowness alone, the ratio between the depth and the wave length, is insufficient to warrant the performance of shallow flow equations with a hydrostatic approach and the nonlinearity in wave dynamics can be better accounted with a hydrodynamic approach. Besides the prediction of the flows over complex bathymetries, for instance, over asymmetrical dunes, by a hydrodynamic approach is shown to be superior in accuracy to the hydrostatic simulation.

Damage to bridges due to the 27 February 2010 Chile earthquake1

Abstract: This paper provides a summary of the damage to bridges in the Mw 8.8 Chile earthquake of 27 February 2010. Lessons from the different types of structural damage observed on concrete and steel bridg...