Nikolas Thomopoulos

Dr. Nikolas Thomopoulos


Research Focus & Metrics

Academic Career Length

8Years (2019-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications
23 April 2021 in Sustainability
Verified
Journal Article
Open access
PDF file
APAmalia Polydoropoulou
Amalia Polydoropoulou
ITIoannis Tsouros
Ioannis Tsouros
NTNikolas Thomopoulos
Nikolas Thomopoulos
CPCristina Pronello
Cristina Pronello
Arnór ElvarssonArnór Elvarsson
Arnór Elvarsson
FCFloridea Di Ciommo
Floridea Di Ciommo
The introduction of shared autonomous vehicles into the transport system is suggested to bring significant impacts on traffic conditions, road safety and emissions, as well as overall reshaping travel behaviour. Compared with a private autonomous vehicle, a shared automated vehicle (SAV) is associated with different willingness-to-adopt and willingness-to-pay characteristics. An important aspect of future SAV adoption is the presence of other passengers in the SAV—often people unknown to the cotravellers. This study presents a cross-country exploration of user preferences and WTP calculations regarding mode choice between a private non-autonomous vehicle, and private and shared autonomous vehicles. To explore user preferences, the study launched a survey in seven European countries, including a stated-preference experiment of user choices. To model and quantify the effect of travel mode attributes and socio-demographic characteristics, the study employs a mixed logit model. The model results were the basis for calculating willingness-to-pay values for all countries and travel modes, and provide insight into the significant heterogeneous, gender-wise effect of cotravellers in the choice to use an SAV. The study results highlight the importance of analysis of the effect of SAV attributes and shared-ride conditions on the future acceptance and adoption rates of such services.

23 November 2020 in Sustainability
Verified
Journal Article
Open access
PDF file
SEShelly Etzioni
Shelly Etzioni
Jamil HamadnehJamil Hamadneh
Jamil Hamadneh
Arnór ElvarssonArnór Elvarsson
Arnór Elvarsson
Domokos Esztergár-KissDomokos Esztergár-Kiss
Domokos Esztergár-Kiss
Milena DjukanovicMilena Djukanovic
Milena Djukanovic
Yoram ShiftanYoram Shiftan
Yoram Shiftan
The technology that allows fully automated driving already exists and it may gradually enter the market over the forthcoming decades. Technology assimilation and automated vehicle acceptance in different countries is of high interest to many scholars, manufacturers, and policymakers worldwide. We model the mode choice between automated vehicles and conventional cars using a mixed multinomial logit heteroskedastic error component type model. Specifically, we capture preference heterogeneity assuming a continuous distribution across individuals. Different choice scenarios, based on respondents’ reported trip, were presented to respondents from six European countries: Cyprus, Hungary, Iceland, Montenegro, Slovenia, and the UK. We found that large reservations towards automated vehicles exist in all countries with 70% conventional private car choices, and 30% automated vehicles choices. We found that men, under the age of 60, with a high income who currently use private car, are more likely to be early adopters of automated vehicles. We found significant differences in automated vehicles acceptance in different countries. Individuals from Slovenia and Cyprus show higher automated vehicles acceptance while individuals from wealthier countries, UK, and Iceland, show more reservations towards them. Nontrading mode choice behaviors, value of travel time, and differences in model parameters among the different countries are discussed.

4 November 2020 in Sustainability
Verified
Journal Article
Open access
PDF file
MKMiltos Kyriakidis
Miltos Kyriakidis
JSJaka Sodnik
Jaka Sodnik
KSKristina Stojmenova
Kristina Stojmenova
Arnór ElvarssonArnór Elvarsson
Arnór Elvarsson
CPCristina Pronello
Cristina Pronello
NTNikolas Thomopoulos
Nikolas Thomopoulos
Autonomous vehicles are anticipated to play an important role on future mobility offering encouraging solutions to today’s transport problems. However, concerns of the public, which can affect the AVs’ uptake, are yet to be addressed. This study presents relevant findings of an online survey in eight European countries. First, 1639 responses were collected in Spring 2020 on people’s commute, preferred transport mode, willingness to use AVs and demographic details. Data was analyzed for the entire dataset and for vulnerable road users in particular. Results re-confirm the long-lasting discourse on the importance of safety on the acceptance of AVs. Spearman correlations show that age, gender, education level and number of household members have an impact on how people may be using or allowing their children to use the technology, e.g., with or without the presence of a human supervisor in the vehicle. Results on vulnerable road users show the same trend. The elderly would travel in AVs with the presence of a human supervisor. People with disabilities have the same proclivity, however their reactions were more conservative. Next to safety, reliability, affordability, cost, driving pleasure and household size may also impact the uptake of AVs and shall be considered when designing relevant policies.

17 October 2019 in Proceedings
Verified
Conference Paper
Open access
PDF file
GHGabriel Hogan
Gabriel Hogan
SDSigma Dolins
Sigma Dolins
ISIzzet Senturk
Izzet Senturk
IFIoannis Fyrogenis
Ioannis Fyrogenis
QFQian Fu
Qian Fu
NTNikolas Thomopoulos
Nikolas Thomopoulos
In this paper two contemporary technological novelties are combined to introduce the concept of a blockchain-based MaaS, with the aim of pinpointing where and how business value can be created through data-based services of such a system. Towards this purpose, an integrated version of the Business Model Canvas is deployed, combining the advantages of the Lean Canvas and the Ethics Canvas. The overview of data flows among the versatile system stakeholders are outlined to highlight the potential benefits for diverse industries through sharing and collaboration.