The paper presents the evaluation of the Eco-driving program impact (classroom with on-road instructions) on truck drivers' operation parameters. A total of 8 professional truck drivers were tested in the real driving conditions. Evaluation of the training impact on the drivers' behavior was done in three periods: intervention period (P1), one month after training (P2) and four months after training (P3). Data was collected with the assistance of the Scania Fleet Management System TM. Fuel economy and CO2 emission, idling time and coasting were significantly improved in the periods P2 and P3 compared to period P1 while speeding significantly increased. Statistically, the use of the brake did not significantly change in the first and fourth month after the completed training in comparison to the intervention period. The drivers' adoption of the eco-driving tips showed that statistically significant differences in fuel consumption and brake usage were obtained. This study shows that the use of the eco-driving techniques has got a potential for significant short-term reduction of fuel consumption and CO2 emission in road transport; hence in the future the research studies will deal with the effects of training and potential downtrend in the long run (> 6 months). Also, future research projects should analyze the impact of the drivers' socioeconomic characteristics on the application of the eco-driving instructions.

Original scientific paperIn an urban public transport system, the primary disturbance in the headway arising in the context of departure times has a tendency to propagate through the system. In this paper, by analyzing the movement of vehicles along a specific transport line, the parameters affecting the propagation of the headway disturbance were identified. The established links between these parameters were utilized in the development of a deterministic model. The model describes the propagation of disturbance in the headway by stops along the line, as well as scheduled vehicles at one urban public transport line. The analysis revealed that the number of stops along the line and the passenger boarding intensity have the most significant effect on the propagation of disturbance in the headway. Keywords: deterministic model; dwell time; headway; urban public transport Deterministički model širenja poremećaja intervala slijeđenja vozila na linijama javnog gradskog prijevoza putnikaIzvorni znanstveni članak U sustavu javnog gradskog prijevoza, primarni poremećaj intervala slijeđenja vozila koji nastaje unutar jednog polaska, ima tendenciju širenja u sustavu. U ovom radu analizom procesa kretanja vozila duž linije, identificirani su parametri koji utiču na širenje poremećaja intervala slijeđenja. Na osnovu utvrđenih relacija između parametara formiran je deterministički model. Modelom je predstavljeno širenje poremećaja intervala slijeđenja po stajalištima duž linije i po polascima u voznom redu na jednoj liniji javnog gradskog prijevoza. Analizom je utvrđeno da najznačajniji uticaj na širenje poremećaja intervala slijeđenja vozila u sustavu imaju: broj stajališta i odnos intenziteta nakupljanja putnika i intenziteta ulaska putnika u vozilo.Ključne riječi: deterministički model; interval slijeđenja vozila; javni gradski prijevoz; zadržavanje vozila na stajalištu

School age children (pedestrians) can move at different speeds, which are conditioned by certain parameters. Not all parameters have the same effect on the pedestrian speed. According to the literature, gender and age are the most researched parameters that have an impact on the speed of pedestrians. However, a small number of authors have dealt with the influence of movement regimes (slow, normal, fast, run, and rush) on pedestrian speed, while at the same time taking into account age and gender. For that reason, this article measured the speed of movement of school age children by movement regimes, taking into account age and gender. Within the same movement regime, the influence of age, sex, height, and weight on the speed of movement was investigated. Experimental measurements of the speed of movement of pedestrians aged 7 to 20 years were performed. Based on the results of measurements and statistical analyzes, recommendations on the average speed of movement regimes, age, and gender are given.

This paper shows an eco-driving pilot program that has been implemented in the public transport company "JGSP Belgrade", Serbia, in order to assess the possibilities of using eco-driving for an entire car fleet of the assessed company in the future. Eco-driving training and education of thirteen drivers were conducted in real driving conditions on the route length of 14 km and consisted of three phases. The results of eco-driving training of thirteen bus drivers confirm the findings of the previous researches that eco-driving has got many benefits. After the training, all drivers saw fuel consumption reduced by 8.61% on average, and consequently the average CO2 emission reduced by 8.61%. The implementation of eco-driving training in the assessed company and the attained fuel economy, leads to significant annual savings. However, some driving parameters were not significantly improved after training indicating a driver's slow adaptation and application of new driving techniques.

– Unreliable functioning of public passenger transpport (PPT) system has direct influence on different aspects of passenger’s journey. Often disturbances in vehicle headway influence users in such manner that they plan their journeys accordingly (leave earlier, choose different line, transfer to another line, changes in mode of travel). This paper will analyse the influence of PPT system’s reliability on decisions and behaviour of PPT system’s users. Keywords – Public passenger transport, reliability, user’s behaviour, vehicle headway