Advanced search options

Advanced Search Options 🞨

Browse by author name (“Author name starts with…”).

Find ETDs with:

in
/  
in
/  
in
/  
in

Written in Published in Earliest date Latest date

Sorted by

Results per page:

Sorted by: relevance · author · university · dateNew search

You searched for +publisher:"Delft University of Technology" +contributor:("Papadimitriou, Eleonora"). Showing records 1 – 3 of 3 total matches.

Search Limiters

Last 2 Years | English Only

No search limiters apply to these results.

▼ Search Limiters


Delft University of Technology

1. Athanasiadis, Omiros (author). A method to assess safety implications during authority transitions in automated driving.

Degree: 2020, Delft University of Technology

The question of how well in terms of safety can a driver take over control of an automated vehicle in response to an emergency situation is of crucial importance. Most of the studies performed so far focus on the drivers’ reaction times and the mechanisms behind the transition. In this study, an effort is made to incorporate the braking times that are required in order to finalize a safety maneuver, with the aim to assess the safety implications of the entire transition in control. For this purpose, a new methodology was developed and a simulation model was used in order to simulate platoons of CACC equipped vehicles. Two new KPIs were defined: the Time to Control and the Safe Time Budget. The results suggest that higher number of critical events and crashes are associated with higher market penetration rates. This reveals that despite the fact that AV can in general increase traffic efficiency and safety, when it comes to emergency situations where safety is inextricably linked to the combination of AV and driver performance, overall safety may be compromised under certain conditions. In addition, the results revealed a strong connection of the above-mentioned action times with the initial speed of the vehicles involved in a conflict. The findings of this research, point to new directions particularly in concern to the extension of the operational design domain of automated vehicles in order to minimize system deactivations, and also with regard to the need for better prediction models and safety assessment tools.

Transport, Infrastructure and Logistics

Advisors/Committee Members: van Arem, Bart (mentor), Papadimitriou, Eleonora (graduation committee), Calvert, Simeon (graduation committee), Klunder, Gerdien (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: Authority transitions; CACC; Safety Assessment; driver behaviour; Simulation; AV; take-over requests

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Athanasiadis, O. (. (2020). A method to assess safety implications during authority transitions in automated driving. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:02dc4999-7050-4cc2-9ac9-bced5e4cbf5f

Chicago Manual of Style (16th Edition):

Athanasiadis, Omiros (author). “A method to assess safety implications during authority transitions in automated driving.” 2020. Masters Thesis, Delft University of Technology. Accessed April 12, 2021. http://resolver.tudelft.nl/uuid:02dc4999-7050-4cc2-9ac9-bced5e4cbf5f.

MLA Handbook (7th Edition):

Athanasiadis, Omiros (author). “A method to assess safety implications during authority transitions in automated driving.” 2020. Web. 12 Apr 2021.

Vancouver:

Athanasiadis O(. A method to assess safety implications during authority transitions in automated driving. [Internet] [Masters thesis]. Delft University of Technology; 2020. [cited 2021 Apr 12]. Available from: http://resolver.tudelft.nl/uuid:02dc4999-7050-4cc2-9ac9-bced5e4cbf5f.

Council of Science Editors:

Athanasiadis O(. A method to assess safety implications during authority transitions in automated driving. [Masters Thesis]. Delft University of Technology; 2020. Available from: http://resolver.tudelft.nl/uuid:02dc4999-7050-4cc2-9ac9-bced5e4cbf5f


Delft University of Technology

2. Buurmans, Kristijn (author). Automatic Train Operation over Legacy Automatic Train Protection Systems: A Case Study on the Groningen-Buitenpost Line.

Degree: 2019, Delft University of Technology

Railways are facing the challenge to simultaneously increase the capacity and the operational performance of their network. Automatic train operation (ATO) can be one of the technologies to increase the capacity of the railway network. The specifications for ATO over the European Train Control System (ETCS) automatic train protection system have been defined. However, testing is taking place over legacy automatic train protection systems , such as ATBNG, as well. ATO requires information from the automatic train protection system. The goal of this master thesis is to determine the data gap between ETCS and ATBNG in relation to ATO. First a generic ATO model is developed from literature. This model presents the information required and produced by ATO. The model is used as a framework for the analysis of ATO over ETCS and ATO over ATBNG. This analysis resulted in a conceptual model of both ATO over ETCS and ATO over ATBNG. The conceptual model shows that ATBNG can provide the required information if the ATBNG operational envelope is used as the relevant safety envelope. However, currently the operational envelope of the NS’54 signalling system is the relevant safety envelope. Additional information is required to allow ATO to determine the NS’54 operational envelope. Furthermore, ATBNG is not capable of presenting ATO information to the train driver. A new ATO DMI is required. Moreover, the ProRail traffic management system is not yet capable of providing ATO with the required information for both ATO over ETCS and ATO over ATBNG. To validate the conceptual ATO over ATBNG model three case studies have been worked out. The study performed for this master thesis is an exploratory study, therefore validation of the findings and assumptions is required.

Civil Engineering | Transport and Planning

Advisors/Committee Members: Goverde, Rob (mentor), Quaglietta, Egidio (mentor), Papadimitriou, Eleonora (mentor), Schaafsma, Alfons (mentor), Delft University of Technology (degree granting institution).

Subjects/Keywords: Automatic Train Operation; ETCS; ATBNG; ATO; Automatic Train Protection System; NS'54

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Buurmans, K. (. (2019). Automatic Train Operation over Legacy Automatic Train Protection Systems: A Case Study on the Groningen-Buitenpost Line. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:dffc21d9-936c-4286-9611-a2a846cfc416

Chicago Manual of Style (16th Edition):

Buurmans, Kristijn (author). “Automatic Train Operation over Legacy Automatic Train Protection Systems: A Case Study on the Groningen-Buitenpost Line.” 2019. Masters Thesis, Delft University of Technology. Accessed April 12, 2021. http://resolver.tudelft.nl/uuid:dffc21d9-936c-4286-9611-a2a846cfc416.

MLA Handbook (7th Edition):

Buurmans, Kristijn (author). “Automatic Train Operation over Legacy Automatic Train Protection Systems: A Case Study on the Groningen-Buitenpost Line.” 2019. Web. 12 Apr 2021.

Vancouver:

Buurmans K(. Automatic Train Operation over Legacy Automatic Train Protection Systems: A Case Study on the Groningen-Buitenpost Line. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Apr 12]. Available from: http://resolver.tudelft.nl/uuid:dffc21d9-936c-4286-9611-a2a846cfc416.

Council of Science Editors:

Buurmans K(. Automatic Train Operation over Legacy Automatic Train Protection Systems: A Case Study on the Groningen-Buitenpost Line. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:dffc21d9-936c-4286-9611-a2a846cfc416


Delft University of Technology

3. Tzouras, Panagiotis G. (author). Implications of trams mixed-operations in urban areas on the safety of vulnerable road users.

Degree: 2019, Delft University of Technology

Tram is a sustainable mode of transport, which is able to transform the modern city centers through the various urban regeneration projects that usually come together with it. Tram tracks are often shared with either motorized traffic or pedestrians/cyclists. In this mixed traffic reality, tram accidents are very rare but severe at the same time. Tram driving is really a complex and very demanding task, since the driver should run on time, maintain his/her concentration, predict the behavior of other road users and protect the tram passengers from falls inside the vehicle cabin. In the past, a limited number of studies has attempted to examine tram safety, especially in urban areas, where trams interact with vulnerable road users (VRUs). Subjective notions of traffic safety, that are more connected with the behavior of tram drivers, such as: perceived safety and driving stress, have never been quantified. This thesis covers all the previously mentioned research gaps in order to explain tram safety problems. By utilizing the new knowledge, a list of practical recommendations, which can reinforce tram safety without downgrading system efficiency, is developed. For the development of statistical models related with perceived safety and driving stress, a stated preferences experiment was conducted in Athens. In the survey, tram drivers rated perceived safety and driving stress in a 7-point Likert scale. According to the estimated model of perceived safety, non-exclusive alignments, such as tram/pedestrian malls and mixed traffic operation, downgrade perceived safety. Furthermore, the existence of an unprotected pedestrian crossing and high volumes of VRUs influenced perceived safety negatively. Driving stress is affected mainly by arrival delay and load of standing passengers. Route familiarity is an additional important factor that influences driving stress. The existence of many random beta parameters in perceived safety and driving stress models confirms the subjective nature of these notions. No statistically significant correlation between these two previous notions was observed. Experienced tram drivers believe that they are ready to respond properly in a section that they perceive as unsafe, if they are familiar with it. If there is no familiarity, tram drivers lack confidence and therefore driving stress is increased. Objective safety was examined in the tram network of Amsterdam using accident records and spatial data, such as location of stations and pedestrian/cycling crossings, level of tram lines separation, cycling intensity, city attraction poles and city districts. In Amsterdam, more accidents per km appeared in tram/pedestrian malls; yet, most of the fatal accidents have occurred in tram tracks that are not shared with other road users. High concentrations of tram accidents were also observed around attraction poles and inside the city center, where the flow of VRUs is quite high. Lastly, as a practical recommendation, a consistent design of a tram line using the knowledge from the estimated perceived… Advisors/Committee Members: Hagenzieker, Marjan (mentor), Farah, Haneen (graduation committee), Papadimitriou, Eleonora (graduation committee), van Oort, Niels (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: Tram; Traffic safety; Vulnurable Road Users; Perceived safety; Driving stress

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Tzouras, P. G. (. (2019). Implications of trams mixed-operations in urban areas on the safety of vulnerable road users. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:a1f0c922-a397-4761-8d4d-022a54fbb5f8

Chicago Manual of Style (16th Edition):

Tzouras, Panagiotis G (author). “Implications of trams mixed-operations in urban areas on the safety of vulnerable road users.” 2019. Masters Thesis, Delft University of Technology. Accessed April 12, 2021. http://resolver.tudelft.nl/uuid:a1f0c922-a397-4761-8d4d-022a54fbb5f8.

MLA Handbook (7th Edition):

Tzouras, Panagiotis G (author). “Implications of trams mixed-operations in urban areas on the safety of vulnerable road users.” 2019. Web. 12 Apr 2021.

Vancouver:

Tzouras PG(. Implications of trams mixed-operations in urban areas on the safety of vulnerable road users. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Apr 12]. Available from: http://resolver.tudelft.nl/uuid:a1f0c922-a397-4761-8d4d-022a54fbb5f8.

Council of Science Editors:

Tzouras PG(. Implications of trams mixed-operations in urban areas on the safety of vulnerable road users. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:a1f0c922-a397-4761-8d4d-022a54fbb5f8

.