In this paper the emphasis is placed on the vehicle factor from the aspect of roadworthiness. In order to determine whether it is a technically correct or defective vehicle, vehicles are subjected to vehicle technical inspections at vehicle testing centers. There are 161 vehicles testing centers in the Republic of Croatia, and 9 more that deal exclusively with preventive vehicle inspections. The aim of the paper is to optimize the locations of vehicle testing centers in relation to the demand for its service. The methodology of the work is as follows, based on the obtained and available statistics from the Center for Vehicles of Croatia (CVH), an analysis was made according to the requirements for the needs of the vehicles testing center. The paper consists of the following chapters: introduction, review of previous research, methodology, analysis of service requirements at vehicle testing centers, discussion and conclusion with the proposal of measures for optimization of services at vehicle inspection stations.

Transport system planning and modelling traffic demand in cities and / or urban areas oriented to the needs of the population are key to create and implement a safe, efficient, environmentally friendly and sustainable transport system. The trend of population growth in urban areas also carries with it an increase in the number of activities resulting in more trips made. By grouping population activities, it is possible to predict future transport demand. The classic approach to transport planning uses a four-step aggregate travel demand model. With the development of information and communication technologies, the possibilities for increasing the mobility of the population are further expanded. Due to the complexity of this problem, the classical approach does not provide the optimal solution. The new approach based on population activity allows for a more detailed and accurate representation of the habits of the population during different periods of the day and thus influences the number, type and characteristics of their travels. This paper will provide an overview of current research on predicting transport demand in urban areas, based on population activity through a disaggregated approach. The methodology, discussion of the topic, evaluation of future research on the subject matter and conclusion will also be presented.

Transport modelling represent one of tools that help various researchers and engineers in the field of transport planning and engineering. Using transport modelling can help to detect the number and characteristics of trips for specific area or regions. Trips can be separated regarding to transport mode (e.g., car, bicycle, public transport, walking, etc.). Public transport has shown numerous benefits comparing to private cars. Determine real and possible number of trips of every transport mode are achieved by using logit model. Logit model is mostly used statistic method for detecting modal split in transport modelling. Data collected by survey conducted in the City of Velika Gorica will be used to calculate logit model of trips. Trips will be separated between public transport and private cars. Goal of paper is creating a logit model that can be used as an initial model in other cities that have similar geographic and sociodemographic characteristics.

The goal and purpose of the research is to show a sustainable way of developing and implementing a completely new system of public passenger transportation on the example of a typical medium-sized Mediterranean city - Šibenik. The hypothesis of the study is to present a possible sustainable implementation of a new system of public passenger transportation regardless of financial, spatial, or other limitations. The research consisted of data and measures determined by the study of the development of urban passenger transport in the city of Šibenik, as well as problems that arose during the implementation phase. The results of the research and study are to confirm the hypothesis and give the possibility to other similar urban areas that sustainable public transport is the future of the transport system of Mediterranean cities.

Older primary schools in Croatia are frequently located in densely built older settlement cores. Micro-locations surrounding school entrances are often not the result of prior urban or traffic planning; instead, they are retroactively managed through infrastructure and signalling interventions. Pupils participate in traffic as pedestrians, cyclists, e-scooter users, or passengers in cars, school buses, or public buses. The proposed integrated research approach includes: an online survey of pupils’ travel behaviour, systematic safety assessments of entrance micro-locations using the iRAP methodology, as well as field measurements and in-depth analysis of vehicle speeds, traffic flow and structure. For classes organised in two shifts, an online survey of parents (for classroom-based education) and pupils (for subject-based education) covered 56% of the pupil population. Because pupils’ travel mode is the factor most susceptible to influence through infrastructure improvements, statistical analysis was conducted using the χ²-test for the purpose of investigating relationships with the other three traffic-relevant determinants: school age group, pupils’ sex, and distance from school. Approximately three-quarters of pupils live less than 2 km from the typical school. If peak vehicle traffic does not coincide with the peak of pupil arrivals and departures during the overlap of two school shifts, part of the traffic on the school-access street may be unrelated to direct school-access activities. Vehicle-type restrictions and one-way traffic operation should be considered as measures to improve pupils’ safety. The proposed groups of measures for improving pupils’ safety include: (i) educational workshops for pupils, parents and teachers; (ii) reconstruction of school entrance micro-locations; (iii) targeted interventions in the traffic environment within a 2 km perimeter.