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Traffic modeling of intersections on vajnorská street in Bratislava

Hájnik Ambróz, Harantová Veronika, Kalašová Alica, Čulík Kristián

Transport Problems

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2021

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T. 16, z. 3

29--40

EN

This article focuses on traffic modeling of intersections in Aimsun. The intersections studied are in Bratislava, the capital of Slovakia. Every year, the number of vehicles on roads increases and congestions are created. Individual intersections do not have unlimited capacity. Simulations help to predict possible future problems and thus the possibility to prevent them. Accordingly, at intersections on Vajnorská street, a traffic survey was carried out using video cameras. Then, simulations were carried out in Aimsun. The results are shown in the tables separately for each intersection along with the determined overall quality level of the intersection. In addition to the current situation, simulations were carried out for increased traffic by 10% and 20%, and overall quality levels were also determined. Finally, the results were evaluated and compared with each other. This article points out the importance of research into the permeability of important points of the road network: intersections. It is necessary to carry out capacity assessments when planning any construction that will affect traffic in each location.

2

Comparison of traffic flow characteristics of signal controlled intersection and turbo roundabout

Kalašová Alica, Skřivánek Kubíková Simona, Čulík Kristián, Palúch Ján

Archiwum Motoryzacji

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2020

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Vol. 88, nr 2

19--36

EN

In the Slovak republic, there is an increase of building roundabouts in both urban and non-build-up areas. The construction of roundabouts in urban areas brings mainly calming of traffic intensity. A roundabout in non-build-up areas could be built only within certain conditions. In this paper, we have been studying a small roundabout location and its traffic characteristics in the city of Hlohovec. In some cases, a small roundabout could be very good solution for exceeded traffic flow capacity of signal controlled intersections as well as for intersections with a high number of traffic incidents. But in our case, a small roundabout is not suitable for such intensity of vehicles as we measured in transport survey. So we focused on other possibilities how to improve this current situation. We have decided to make a proposal of signal controlled intersection as well as a turbo roundabout and compare the results of traffic characteristics of each proposal. We have made several simulations of each variant of traffic situation, using transport-planning software Aimsun, and calculate average values of all recorded traffic characteristics. As inputs, we have used intensities and other basic data obtained from transport survey. Using simulations outputs of transport planning software, we have been able to compare a current state with signal controlled intersection and turbo roundabout. Traffic characteristics of turbo roundabout show significant improvements compare to signal controlled intersection, f.e. in delay time (more than 68%), travel time (more than 22%), number of stops (more than 73%). Turbo roundabout seems to be the best solution for traffic organising at this chosen intersection in the city of Hlohovec, regarding travel time, delays, number of stops and safety at all.

3

Reducing Delay Time at Signal Controlled Junction with the Help of Actuated Control

Černický Ľubomír, Kupčuljaková Jana, Paľo Jozef, Kalašová Alica

Advances in Science and Technology. Research Journal

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2020

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Vol. 14, no 3

149--157

EN

Nearly every town faces the traffic problem caused by the continuous increase of the traffic volume. Traffic collapses, congestions, accidents and a further negative impact on the environment are gradually becoming a common part of our lives. Junctions are the most critical points of the road network, which usually determine the capacity of the roads. Therefore, proper traffic organization at junctions is a necessity. This paper analyses the actuated control in comparison to the fixed control at a signal-controlled junction. It also includes a case study of one problematic junction in this paper. With the help of microscopic simulation in Aimsun, 2 solutions for this problematic junction were assessed, one of which is fixed control and other is actuated control. Actuated traffic control gives better results than fixed control.

4

Assessing the Impact of the Change in the Tire Pressure on the Rolling Resistance and Fuel Consumption

Synák František, Kalašová Alica

Advances in Science and Technology. Research Journal

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2020

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Vol. 14, no 3

100--106

EN

The value of tire pressure affects a number of important vehicle features. The article pays attention to assessing the impact of the change in the tire pressure on both the rolling resistance and fuel consumption. The measurements were performed with four different values of tire pressure. The impact of the change in the tire pressure on the rolling resistance was measured during the driving tests. In order to measure the rolling resistance during tests, the measurement methodology was devised and a device for measuring the rolling resistance was constructed. The measurement of the impact the tire pressure change on the fuel consumption was performed via vehicle dynamometer. The result showed a linear dependence between the tire pressure and rolling resistance. These results measured points to the importance of keeping the correct value of the tire pressure in relation to the fuel consumption.

5

Public transport as a part of shared economy

Kalašová Alica, Harantová Veronika, Čulík Kristián

Archiwum Motoryzacji

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2019

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Vol. 85, nr 3

49--56

EN

Nowadays, the issue of sustainable mobility is very resonant in the professional public. Main topic for discussion is a transport as a one of the biggest polluters in the world. Today's transport brings a number of benefits to society, but often it has a high price. This price is paid by wasted human lives and serious environmental damage. Therefore there is no wonder that a number of cities, municipalities and regions regard transport as the key to their development, but at the same time as a threat to the health of the population, their safety and quality of a whole life. The combination of public and shared transport is necessary for clean and smart mobility. Shared economy is a concept of social change in the 21st century. This paper is focused on above mentioned issues. It describes levels of the smart city concept and principles and forms of shared economy in transport and shared mobility.

6

Traffic Modelling of the Circular Junction in the City of Žilina

Čulík Kristián, Harantová Veronika, Kalašová Alica

Advances in Science and Technology. Research Journal

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2019

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Vol. 13, no 4

162--169

EN

Nowadays, a high-quality road network is necessary for sustainable transport systems. A sharp rise in automation results in increased transport problems. The most serious problems include the traffic infrastructure congestion, congestion, and increased risk of a traffic accident and, of course, a negative impact on the environment. The mobility of inhabitants and the transport of goods are one of the key transport objectives. A junction still constitutes the most critical point on the road network. That is why crossing the road smoothly and safely makes a large difference for the vehicle. This article provides an analysis of the current state of the selected circular junction. On the basis of the conducted survey, new solutions for this junction were presented, which should prevent the traffic conditions from becoming obtrusive. The Aimsun microsimulation was performed for checking the new proposals.