Grzegorz Sierpiński

Methods of Modeling the Bicycle Traffic Flows on the Roundabouts

The paper deals with the bicycle traffic issues on the roundabouts and their nearby areas. The fundamental elements of traffic management and infrastructure used in traffic regulation on the roundabouts have been presented. The authors present also the examples of typical settings of the bicycle paths. Amongst the conventional solutions some interesting ones from abroad, from the Netherlands in particular, which grant a huge level of traffic safety while crossing a roundabout, have also been introduced.

Problems and Issues with Running the Cycle Traffic through the Roundabouts

The paper deals with the bicycle traffic issues on the roundabouts and their nearby areas. The bicycle traffic characteristics as well as pros and cons of a bicycle as a means of transportation with the current situation of cycling in Poland have been presented. The authors also presents the results of research on traffic safety of the cyclists on the traffic circles. In addition, the fields of knowledge lacking complete information on the solutions to bicycle traffic on the roundabouts are being pointed out.

Model of Incentives for Changes of the Modal Split of Traffic Towards Electric Personal Cars

Application of technology that uses electric drive opens up new possibilities in traffic. Previous models of modal split traffic usually included four types of movements (by car, by public transport, by bicycle and by foot). Personal car was then perceived as the least eco-friendly. The creation of new means of transport changed this situation. The article focuses on the problems associated with the development of transport systems in the direction of support electric cars. At the local level and national level in different parts of the world are accepted various types of incentives that will bring about changes of travel behaviour and increase participation of electric cars in the traffic. The article presents possible model the relationship between different types of incentives and determines barriers that must be overcome in order to improve the image of this means of transport. Example of using the proposed method was also briefly described.

Theoretical Model and Activities to Change the Modal Split of Traffic

The article deals the most popular modal split model of traffic. Actualization of this model was also proposed. Especially with information from White Papers. Some of these documents have clearly indicated the development directions of transportation after 2010.

Travel Behaviour and Alternative Modes of Transportation

A high number of vehicles have caused strong congestion, mainly in city centres. A sustainable development of transport contains two essential physical activities. These are a formation of the traffic flows divided into different means of transportation that cover the pro-environmental transport on one side, and an innovation technology development to reduce the negative results of transportation for the surroundings on the other. There is – apart from the two factors already mentioned – a huge need for changes in the travel behaviour of people making the trips as well as a need for changes in the approach to the problem of a city development in terms of mobility.

Revision of the Modal Split of Traffic Model

Knowledge about decision-making factors in mode choice is important during the transport processes designing. The traffic distribution modeling should be follow with agreement of sustainable development principles. The article describes the modal split of traffic model. Changes of function of utility was also proposed. Changes in the model are results of changes in the approach to the problem of transport in cities in directions to sustainable development.

Technologically Advanced and Responsible Travel Planning Assisted by GT Planner

Sustainable development of transport triggers changes targeting reduction of emission of harmful substances and noise, and by that means also fostering more eco-friendly solutions. Particularly with regard to urban areas, these changes must not be limited to the “hard” (i.e. infrastructural) activities only. Emphasis is mainly placed on two aspects, i.e. development of modern supporting technologies (including ITS) and changes in habits of the travelling population. Behaviour patters of travellers constitute a particularly important element in the process of appropriately shaping the future of transport systems. This article highlights the matter of responsible travel planning understood as a more environmentally aware approach to the effects of transport. Contemporary tools known as trip planners provide assistance for planning of travels as well as for appropriate flow of information about alternative travelling modes to the travelling person. The requirements typically applied to similar planners have been discussed using the example of a tool developed for research purposes, namely GT Planner. The trip planner described in the paper is a universal platform enabling transfer of information on the available travel options, using additional criteria which make it possible to travel in a more eco-friendly manner.

Use of GSM Technology as the Support to Manage the Modal Distribution in the Cities

The concept of use of GSM technology to manage the congestion in the agglomerations and metropolitan areas is described in the paper. The topic is reviewed from two different angles. Firstly, by the acquisition of dynamic information about relocations (with the accuracy of up to a single user and vehicle type) it becomes possible to better adapt the offer of the urban public transportation to the needs of the passengers. Secondly, the data on the identification of movements of the urban public transportation vehicles may, due to the application of GSM technology, be made available to the passengers in real time allowing them to make rational decisions on the choice of the mode of travel. The presented problem discussion is aimed at supporting the solutions reducing the congestion in the cities (in this case by changing the modal split of the traffic) and at reducing the negative influence of the transportation on the environment (the increase of the share of environmentally friendly means of transportation in the overall traffic).

Distance and Frequency of Travels Made with Selected Means of Transport—A Case Study for the Upper Silesian Conurbation (Poland)

The article addresses selected outcomes achieved by developing a traffic model for the Upper Silesian conurbation area under the international Green Travelling project implemented within the framework of the ERANET Transport III programme. The focal point was the travelling distance considered as one of fundamental determinants of the choice of a travelling mode. From a multitude of different travelling modes, the two with the largest number of travels being made by their means were chosen for comparison, namely a passenger car and public transport. In the latter case, a differentiation was made at the modelling stage between a direct travel (without changing) and travel with changing (when it was necessary to change to another means of public transport). The research has evidenced that there are clear dependences between the distribution of frequency of travelling (by different modes) in the function of distance and the motivation to travel.

The model of modal split organisation in wide urban areas using contemporary telematic systems

The article outlines chosen technical possibilities in the field of metropolitan transportation organization based on justified modal splits. The introduction clarifies the policy of sustainable transport and ways of determining modal splits. The article also summarizes existing obstacles linked with the organization of modal splits within the transportation network. It also outlines modern, developing telematics systems which enable the implementation of sensible traffic organization with modal splits. The article also contains a traffic organization concept for the presented modal split model. The conclusion outlines potential benefits arising from the proposed method of shaping modal splits.