Knowledge of the characteristics of speed at roundabouts is very important in design procedures, simulation models, and determining the influence of these roundabouts on traffic conditions in a street network. Sustainable management in the street network means the influence of all its parts on traffic conditions and travel time. In order to reliably determine roundabouts parameters in the procedures of planning and the choice of sustainable method of traffic management, it is very important to know the values of the traffic flow parameters, particularly the speeds at the entry and exit leg, as well as in the circulatory zone. This article analyses the speed characteristics in traffic flow at urban roundabouts with different geometrical characteristics in the city of Banja Luka. The applied method for traffic data collecting in this research was the method of video recording processing, which excludes any influence on driver behavior. Furthermore, statistical analysis was conducted, which established the correlation between the achieved speeds and geometrical characteristics of the intersection. Due to roundabout characteristics, the research was focused on the access, that is, the entry leg, the segment of the circulatory zone and the exit leg. The research results showed there is a significant dependence between geometrical characteristics of certain elements of the roundabout on speeds. In the further course of the research, it was proved that the variation of speeds at the segments of roundabouts significantly affects the size of time losses and emission of pollutants, i.e., parameters based on which it is possible to objectively assess the possibility of sustainable implementation of the planned solution of roundabouts of similar geometry within the street network in cities similar to Banja Luka.

The increase in traffic caused by new development affects the change in traffic conditions on the surrounding roads, and shopping centres are significant traffic generators. The development of local travel generation rates and their characteristics for individual land uses from the aspect of traffic demand is a reliable way to plan traffic in order to come up with preventive solutions to traffic problems, that is, prevention of possible negative consequences on traffic conditions in the street network occurring due to the construction of shopping centres. One of the main aims of this paper is to develop a model for objective assessment of the generated traffic demand for significant changes in land use, such as the construction of shopping centres in medium-sized towns. All these would be steps in the right direction for the promotion of reliable traffic planning and adoption of TIA for every new development before a decision regarding the change in land purpose has been made. This kind of process still has not been established systematically in either Bosnia and Herzegovina and the Republic of Serbia, or in surrounding countries. This paper focuses on the formulation of a model for determining the volume of traffic generated by shopping centres in medium-sized towns in two countries of the Southeast Europe region. The survey was conducted in eight different locations (cities) where there are shopping centres with common facilities. The analysis showed that the number of visitors and vehicles attracted by the shopping centre zone can be determined by a model based on a linear regression analysis. The analysis included exploring several different factors of trip generation in shopping centres, including the relationship between trip generation and combinations of several independent variables. The verification of the model was conducted in real conditions of the traffic flow generated by a shopping centre which was not the analysis subject when forming the forecasting model. In this way, the validity of the proposed model is credibly assessed. The developed model can be applied in the procedures of planning the construction of shopping centres in medium-sized cities in the Republic of Serbia and Bosnia and Herzegovina, and wider, in the region of Southeast Europe, in order to estimate the volume of generated traffic demand, that is, its impact on the conditions of traffic on the surrounding traffic network.

A well-organized public transport system, which includes, among others, the provision of quality information to users, is one of the key factors in the creation of a sustainable transport system. Residents' everyday needs mainly include the use of cell phones, so their use in the context of the information system in public transport via a smart phone application is a practical way to make this mode of transport "at hand" of users. This paper outlines the activities on improving the public transit system in the city of Novi Sad carried out through the TRIBUTE project - inTegRated and Innovative actions for sustainaBle Urban mobiliTy upgradE. Improvements to the public transport system have been achieved through the mobile app and its integration with the taxi and bike-sharing system, and information displays on bus stops.

Characteristics of a quality taxi transport are efficiency, being economical and functional, which are provided by, among others, an adequate distribution and capacity of taxi stands in accordance with the needs of the passengers. The lack of parking space at a taxi stand affects the occurrence of additionally covered distance and unprofitable use of working hours which taxi drivers spend cruising, trying to find another vacant parking lot. Within this paper, the methodology of the taxi stand assessment from this point of view has been described, and the analysis of the cost effectiveness of the introduction of contemporary vehicle detection technology at the taxi stands as a measure for the reduction of the consequences of lack of parking capacity.

In this paper standard methods for determining of bus stops along route have been analyzed. The analysis is focused on the lines of bus transport where the bus system appears as an independent system and not as a subsystem for LRT or metro line supplying. Some of alternative models for defining of bus stops and optimization of public transport systems also were analyzed. Furthermore, method for quantitatively defining territories of railway station was also analyzed like potentially applicable to bus public transport system.