Dániel Miletics

55746426900

Publications - 8

Adaptation of road safety inspection method to railway level crossings

Dániel Miletics Marcell Ladich

Publication Name: Pollack Periodica

Publication Date: 2025-03-26

Volume: 20

Issue: 1

Page Range: 39-45

Description:

In recent years, the number of road traffic crashes showed a decreasing trend in Hungary, but this cannot be stated about crashes at road-railway level crossings. The Hungarian Railways has repeatedly called attention to the dangers of rail transport. The main goal of this paper is to develop a new safety inspection method for road-railway level crossings based on the existing road safety inspection method. Based on the experiences of road safety inspections completed at ten locations suggestions were given for the adaptation of the method to railway crossings. The most important findings of the safety inspections are also presented in the paper.

Open Access: Yes

DOI: 10.1556/606.2024.01043

The role of driver's eye height in the design of crest curves of roads

Dániel Miletics Khalil Khaska

Publication Name: Pollack Periodica

Publication Date: 2023-09-25

Volume: 18

Issue: 3

Page Range: 113-118

Description:

The driver's eye height from the ground, as what drivers can see on the road, is essential for their safety and for avoiding road hazards. Using the statistical analysis of vehicles sample, the statistical parameters of the measured set of values were determined. A one-sample t-test was done to check whether the measured sample differs from the driver's eye height value specified in the Hungarian design guidelines. A new range of driver's eye height has been found, which is considered an update to the current value and might be applied in the upcoming road design. Parallel with the eye-height analysis, sight distances at vertical crest curves were modeled by AutoCAD Civil 3D. The minimum radiuses of the crest curves were defined for human eye height and for sensors of autonomous vehicles.

Open Access: Yes

DOI: 10.1556/606.2023.00808

A case study on the capacity of a signalized circular intersection

Dániel Miletics Bereket K. Basa

Publication Name: Pollack Periodica

Publication Date: 2023-09-25

Volume: 18

Issue: 3

Page Range: 106-112

Description:

Analyzing the capacity of a signalized circular intersection is an essential aspect of traffic flow management. With the increased number of vehicles at the intersection, it is preferable to examine ways to increase capacity without altering the existing geometric features. A signalized circular intersection on the national highway in Gyor, Hungary, between 47° 40′ 43.7988″ N and 17° 39′ 37.6668″ E is chosen and analyzed for capacity enhancement. The survey is conducted using 360-degree cameras. The PTV Vissim software is then used to construct a model based on the current and projected vehicle counts, as well as the current and proposed options. The result shows that it is possible to increase the capacity of signalized circular intersections without altering the geometric features.

Open Access: Yes

DOI: 10.1556/606.2023.00766

Analysis of the economic benefits of an appraisal of an intersection

Balázs Horváth Dániel Miletics Bereket K. Basa

Publication Name: Pollack Periodica

Publication Date: 2023-07-11

Volume: 18

Issue: 2

Page Range: 78-83

Description:

Ethiopia's government proposes paving existing roads or building modern intersections in cities to reduce maintenance costs. An unimproved signalized intersection at 6° 51′ 47.9″ N and 37° 45′ 50.1″ E is selected for this research. Cost-benefit analysis is used to evaluate the proposed innovative approach to designing and implementing an intersection and to compare whether the new road projects will have an adequate return. This research suggests converting the current intersection into a signalized roundabout to calm traffic. Signalized roundabouts have a higher net present value and a modified internal rate of return than improved signalized crossing intersections. Considering the country's high inflation rate, three scenarios recommend using a signalized roundabout.

Open Access: Yes

DOI: 10.1556/606.2023.00767

Sight distance analyses for autonomous vehicles in Civil 3D

Dániel Miletics Khalil Khaska

Publication Name: Pollack Periodica

Publication Date: 2021-12-31

Volume: 16

Issue: 3

Page Range: 33-38

Description:

Nowadays, self-driving cars have a wide reputation among people that is constantly increasing, many manufacturers are developing their own autonomous vehicles. These vehicles are equipped with various sensors that are placed at several points in the car. These sensors provide information to control the vehicle (partially or completely, depending on the automation level). Sight distances on roads are defined according to various traffic situations (stopping, overtaking, crossing, etc.). Safety reasons require these sight distances, which are calculated from human factors (e.g., reaction time), vehicle characteristics (e.g., eye position, brakes), road surface properties, and other factors. Autodesk Civil 3D is a widely used tool in the field of road design, the software however was developed based on the characteristics of the human drivers and conventional vehicles.

Open Access: Yes

DOI: 10.1556/606.2021.00380

Human decisions at irregular overtakings

Dániel Miletics

Publication Name: 6th IEEE Conference on Cognitive Infocommunications Coginfocom 2015 Proceedings

Publication Date: 2016-01-25

Volume: Unknown

Issue: Unknown

Page Range: 145-149

Description:

Overtaking (passing) is a high risk maneuver for road users, still drivers often accept this risk and moreover they often commit irregular overtaking maneuvers. The paper gives some overview on the background of traffic violations and irregular overtaking maneuvers. Driver's decisions before and during the irregular overtaking maneuvers are similar to the normal ones, except of the decision about committing the violation itself. A decision support application is recommended to reduce the number of overtaking violations and useless overtakings.

Open Access: Yes

DOI: 10.1109/CogInfoCom.2015.7390580

Comparison of Italian and Hungarian Black Spot Ranking

Dániel Miletics Attila Borsos S. Cafiso C. D'Agostino

Publication Name: Transportation Research Procedia

Publication Date: 2016-01-01

Volume: 14

Issue: Unknown

Page Range: 2148-2157

Description:

Black spot ranking is an important tool for finding the sites with potential safety improvement on the road network. The EU Directive on Road Infrastructure Safety Management also demands the ranking of high accident concentration sites. This paper gives an introduction to localizing high accident concentration sites and the indicators used by Italy and Hungary. Accident and traffic volume data are gathered for motorway sections from both countries. Safety ranking is made using two conventional indicators, absolute number of accidents and accident rate. A more sophisticated ranking using the Empirical Bayes method is applied. Expected average crash frequency with Empirical Bayes adjustment is calculated. Based on the estimation of the crash frequency, the Critical Crash Rate (CCR) was added to identify and rank black spots. This additional performance measure is able to take into account traffic volume as required by the EU Directive. Results of the Empirical Bayes method are compared with the conventional procedures. It is concluded that the results are not comparable; inasmuch as there are modifications in the order of black spots. Based on the comparison of results recommendations are given to change the practice in both countries.

Open Access: Yes

DOI: 10.1016/j.trpro.2016.05.230

Traffic safety impacts of irregular overtaking in left-turn lanes at road intersections outside built-up areas

Dániel Miletics

Publication Name: Pollack Periodica

Publication Date: 2013-04-01

Volume: 8

Issue: 1

Page Range: 41-51

Description:

Overtaking is a high risk maneuver for road users, still drivers often accept this risk, moreover they often commit irregular overtaking maneuvers. The paper gives some overview on traffic violations and irregular overtaking maneuvers. Left-turn lanes on major roads are usual elements of un-signalized at-grade junctions on two-lane roads outside urban areas. In several cases the left-turn lane, built for safety reasons, has the unintended negative effect, of becoming a dangerous spot. The paper analyses overtaking maneuvers at left-turn lanes on Hungarian roads. Site surveys were completed at typical sites outside built-up areas. Relationships between the frequency of irregular maneuvers, accident statistics, geometric parameters and traffic data are analyzed.

Open Access: Yes

DOI: 10.1556/Pollack.8.2013.1.4