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Fac ulty of Trans port and Traf fic En gi neer ing, Uni ver sity of Bel grade, Bel grade, Ser bia Orig i nal sci en tific pa per Trans port rep re sents an in dus try sec tor with in tense en ergy con sump tion, the road trans port sec tor within is the dom i nant subsector. The ob jec tive of the re search presented in this pa per is in de fin ing the ac tiv i ties which ap plied within road freight trans port com pa nies con trib ute to en hanc ing ve hi cles' en ergy ef fi ciency. Ve hi cle fleet op er a tion man age ment pro cess ef fects on fuel con sump tion de crease have been looked into. Op er a tion pa ram e ters that in flu ence ve hi cle fuel con sump tion were ana lysed. In this sense, a sur vey has been real ised in or der to eval u ate the vehi cle load fac tor im pact on the spe cific fuel con sump tion. Mea sures for en hanc ing ve hi cle's lo gis tics ef fi ciency have been de fined. As a tool for those mea sures' im plemen ta tion an al go rithm for ve hi cle fleet op er a tion man age ment was de vel oped which rep re sented a ba sis for a ded i cated soft ware pack age de vel op ment for ve hicle dis patch ing pro cess de ci sion sup port. A set of mea sures has been rec om mended and their ef fects in fuel sav ings were eval u ated. Vujanovi}, D., et al.: Energy Efficiency as a Criterion in the Vehicle Fleet .

In an era of increased scarcity of resources and pollution, the concept of the circular economy is re-emerging to steer supply chains towards more sustainable business practices. The potential of value recovery provides opportunities for the creation of circular supply chains. Reverse flows and value recovery processes are scarcely studied in the context of fresh food supply chains. In this paper, we report findings from an empirical study of three food networks regarding the nature of circular flows, as well as factors that affect their creation. These networks differ in their structure and organisation of value recovery processes.We analyse value recovery in light of following elements: product residual value, quantities available for recovery, value from recovery, and markets for recovered products. We show that 1) financial value from recovery is a necessary condition for profitability of operations of any value recovery process in fresh food supply chains, but not for the occurrence of the corresponding loop itself; 2) reuse and remanufacturing loops likely feed into alternative markets, while recycling loops likely feed back into fresh food supply chains.

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The paper's goal is to unify practical and theoretical aspects of internalisation of external costs, in line with the "polluter pays" and "user pays" principles. Due to the impossibility of applying an ideal economic solution for internalisation of external costs, alternative solutions have to be developed and implemented. One of the possible solutions for internalisation of external costs of CO 2 and pollutant emissions from passenger cars is presented in this paper. It is a new methodology for calculating annual circulation taxes on passenger cars. This methodology, besides CO 2 , also takes into account the pollutants whose emissions are regulated by the Euro standards (CO, HC, NO x and PM), as well as the vehicle age and kilometres driven. The proposed methodology has been tested on some of the best-selling passenger cars in Europe. The results of analysis show significant differences between our methodology and the methodologies that are used in five European countries (Ireland, the United Kingdom, Malta, Luxembourg and Sweden), which use the CO 2 emissions as a reference value for their calculation. Also, we have proved that the annual circulation tax, calculated using our methodology, provide better internalisation of external costs compared to the fuel tax.

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The paper deals with the problem of a dynamic analysis of truck-cranes. Therefore, the article has developed a mechanical-mathematical model having 18 generalized coordinates. Depending on the type of truck crane operation as well as on the fact whether the aim of the article is to conduct the dynamic analysis of the whole truck crane or only that of one of its components, simpler mechanical models are also offered. The presented model is more realistic than those describing the dynamic behaviour of the truck-crane performing all necessary functions, i.e. a mobile means of lifting, transportation and reloading.