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Impact of road geometry on vehicle energy consumption

Luin B., Petelin S.

Transport Problems

2017

T. 12, z. 2

77--87

It has been shown that road geometry has a great impact on overall Energy consumption and emissions. Some roads connect traffic origins and destinations directly. On the other hand, some use winding, indirect routes. Indirect connections result in longer distances driven and increased fuel consumption. A similar effect is observed on congested roads and mountain roads with many changes in altitude. Therefore, we propose a framework to assess road networks based on energy consumption. This framework should take into consideration traffic volume, shares of vehicle classes, road geometry and energy needed for road operation and construction. It can be used to optimize energy consumption with efficient traffic management and to choose an optimum new road in the design phase. This is especially important as the Energy consumed by the vehicles soon supersedes the energy needed for road construction.

An improvement in ro-ro stern berthing modelled on a case study

Perkovic M., Batista M., Vidmar P., Luin B.

Zeszyty Naukowe Akademii Morskiej w Szczecinie

2016

nr 45 (117)

134--142

The high volume transported by ro-ro vessels has not come without a price. Accidents and incidents related to design – lack of bulkheads, instability, problems with cargo access doors, stowage, securing cargo and lifesaving appliances – are growing along with the size of the vessels themselves. One particular and recurrent problem is the degree of these giant box-like high riding vessels exposed to wind. Recently the effect of a tramontana – a fierce, sudden and short term regional wind – in the Port of Koper was to detach a moored ship, causing an accident. This paper will present a study of that accident, and through simulations and modelling determine an improvement that will allow berthing perpendicular to the stern ramp to function more securely.