Scientific Journal of Silesian University of Technology. Series Transport

6

Authors: Andrey BREUS, Vitaliy PAVLENKO

Plasma-based technology is used to deposit a wear-proof nanostructured coating on plunger tappets of pump of aviation oil system block, which allows increasing the life of the parts up to 3–5 times. For the nanostructured coatings, which are formed at the impulse bias supply, the electric field strength is 103-104 times greater than for the microstructured coatings. It results in significant change of activation energy of the process of strong bond formation in the growing coating, which makes it possible to obtain high qualitative characteristics of the coating.

7

Authors: Zbigniew CZAPLA

The paper presents a method of vehicle detection on a two-way road. Vehicle detection is carried out on the basis of the video stream from the camera placed over a road. The input image sequence is created by consecutive frames taken from the video stream. Images from the input image sequence are processed individually one by one. A detection field is defined for each lane of the road. Images from the input image sequence are converted into point image representation. The sums of the edge points within the detection fields are calculated. States of the detection fields are determined on the basis of calculated sums of the edge points. Vehicles are detected by analysis of states of the detection fields. Experimental results are provided.

9

Authors: Teresa PAMUŁA

The paper presents a method of classification of road traffic conditions based on the analysis of the content of images of the traffic flow. The view of the traffic lanes with vehicles is treated as a texture, while the change in the description of its characteristics is ascribed to the change in the density of traffic. Four classes of conditions are determined on the basis of the values of Haralick texture features. An MLP network is used for classification. Video data, which were registered by an UAV hanging over a traffic junction, are used for validation of the method.

10

Authors: Wiesław DŹWIGOŃ

Accurate design of infrastructure for public transport is the basis for the efficient functioning of traffic and passenger transportation. The article presents an analysis of the availability of public transport stops. The measure of the availability relates to access times to certain stops from other stops and the surroundings of the transport hub. The article discusses the scope and the objective of measuring pedestrian and passenger traffic. It also presents an analysis of transition times for the passengers who change their means of transport and need to reach a stop. The provided measurements were carried out on a two-level interchange tram-bus hub. Thus they should be part of any assessment of the quality of passenger service in the hub.

11

Authors: Andrzej BANACHOWICZ, Adam WOLSKI

The operation of vehicles (watercraft, aircraft, land-based,spacecraft, unmanned) requires the use of navigation systems for their control. These systems can be characterized by varying degrees of complexity and technological advancement. However, each system has sources of information about the state (position) of the navigating object, state of the environment in which the object is moving and the task to be accomplished. These components are integrated by the decision-maker (human or automated), who/which makes and implements decisions adjusted to current conditions.

11

Authors: Krzysztof GRZELEC, Krystian BIRR

In many EU cities, trolleybuses are experiencing a period of revitalization. New lines, state-of-the-art designs, the use of auxiliary propulsion batteries, ecological values and other factors offer great opportunities for this kind of public transport as an effective tool to shape transport policy in accordance with the principles of sustainable mobility. Gdynia is one of three cities in Poland with a trolleybus public transport subsystem. Since the beginning of political and economic transformation, Gdynia’s authority consistently implements measures aimed at balancing urban mobility, above all by improving the quality of public transport services and creating conditions for the development of alternatives forms of transport to private car travel. The experience of the development of trolleybuses in Gdynia as an element of sustainable mobility, the nature of this means of transport in both economic and operation terms, the implementation of original technological solutions in the trolleybuses’ construction and the impact on decision-making by marketing research are the areas of interest in this paper

11

Authors: Marek RUTKOWSKI

The aim of this article is to describe the proposals from administrators during the mid-19th century to improve the regulation of, and the rafting status on, the Vistula and other main watercourses in the Kingdom of Poland. The deliberation process is also shown, especially in order to reveal the genuine attitude of the Tsarist-controlled Polish authorities towards these requests.

13

Authors: Romanika OKRASZEWSKA, Krzysztof GRZELEC, Kazimierz JAMROZ

Modal share is an important component in developing sustainable transport within a city. In recent years, many cities have set modal share targets for balanced and sustainable transport modes: 30% of public transport and 30% of non-motorized (cycling and walking) modes. Gdansk strategic documents have set similar goals with some actions already taken towards those goals. The cycle network is increasing popular. Gdansk’s cycling infrastructure is more developed than that in other Polish cities. Promotional actions are undertaken each year. Despite that, the share of cycling in the modal split still remains at the low level of 1-3%. The article analyses the case study of Gdansk’s cycling policy and its results. The article summarizes the modal share targets set in Gdansk’s strategic documents, describes the development of its cycle network and promotional campaigns, and presents the volume of bicycle traffic and its share in the city’s modal split. Finally, the article aims to identify the causes behind the low percentage of bicyclists in Gdansk