Konstantina Gkritza

Konstantina Gkritza
Purdue University | Purdue · School of Civil Engineering

PhD

About

100
Publications
19,990
Reads
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2,117
Citations
Additional affiliations
August 2019 - present
Purdue University
Position
  • Professor
August 2013 - July 2019
Purdue University
Position
  • Professor (Associate)
August 2007 - July 2013
Iowa State University
Position
  • Professor (Assistant)
Education
August 2003 - December 2006
Purdue University
Field of study
  • Civil Engineering-Transportation
August 2002 - August 2003
Virginia Polytechnic Institute and State University
Field of study
  • Civil Engineering-Transportation
September 1996 - November 2001
National Technical University of Athens
Field of study
  • Civil Engineering-Transportation

Publications

Publications (100)
Article
The two most traditional and conventional transportation modes, private vehicles, and public transit, may be disrupted due to the advent of shared autonomous vehicles (SAVs), which can offer affordable on-demand mobility solutions leading to a transformed transportation system. However, little is known about the attributes affecting mode choice dec...
Technical Report
Full-text available
Economic Resilience and Recovery in the U.S. Great Lakes Region: A Socioeconomic and Transportation Infrastructure Perspective: This report explores transportation and socioeconomic drivers of the economic resilience in two regions in Indiana, which include Northwestern Indiana Regional Planning Commission (NIRPC) and Southeastern Indiana Regional...
Article
Electricity is expected to become a dominant power source in the transportation sector, but under a stationary recharging model, electric powered vehicles still suffer some disadvantages relative to conventional vehicles. Recent developments in wireless power transfer (WPT) technology can enable an alternative vehicle recharging model wherein power...
Article
Full-text available
This paper proposes a well-grounded theoretical model to assess the factors influencing the intention to ride in autonomous vehicles (AVs). The model is based on the Theory of Planned Behavior (TPB), which has been decomposed to account for key components of the Diffusion of Innovation (DoI) theory and extended to include other influential attitudi...
Conference Paper
Full-text available
Historically the US transportation system has been continuously improved to adopt new policies and technologies. The transportation vehicle energy transition from fossil fuels to electricity is promoted by policymakers and major automakers with an expectation of enhancing sustainability aspects such as fossil fuel consumption reduction, carbon emis...
Article
Introduction Health problems such as obesity and related illnesses have been attributed to the lack of both spatial and economic access to healthy food. Even though access to healthy food in urban areas has been widely studied, access to healthy food in rural areas has not received much attention to date. Rural residents usually face similar access...
Article
Dynamic charging has the potential to overcome the barriers to electric vehicle (EV) adoption by converting road segments into powered lanes (electric roadways or ERs). This paper focuses on examining public acceptance by determining the factors that affect the short-term and long-term intention to purchase an EV and drive on ERs; identifying the c...
Article
Introduction Autonomous Vehicles (AVs) could have profound effects on mobility, safety, and the build environment. In specific, AVs are expected to provide more mobility choices to the elderly and underserved areas, reduce traffic congestion and transportation costs, among others. The changes in built environment could result in a reduction in acti...
Article
Shared e-scooter systems have been growing rapidly in many cities as a potential sustainable transportation mode. However, whether shared e-scooters compete with or complement existing public transportation is still unclear. This study proposes a modeling framework to identify the potential impacts of e-scooter trips on the existing bus system, con...
Article
Full-text available
Introduction: The U.S. experience with motorcycle helmets affords an important insight into the responses of adolescents to age-specific laws. Political contention has led to a number of U.S. state law changes back and forth between universal and age-specific laws. Because both kinds of law require adolescent motorcyclists to wear helmets, relativ...
Article
Whereas the importance of transportation for economic growth is widely acknowledged, past studies on the resilience of regions to economic shocks have not given explicit attention to the role of transportation accessibility on building robust regional economies. This exploratory study examines the regional performance in six U.S. states during the...
Article
Introduction: While improved safety is a highly cited potential benefit of autonomous vehicles (AVs), at the same time a frequently cited concern is the new safety challenges that AVs introduce. The literature lacks a rigorous exploration of the safety perceptions of road users who will interact with AVs, including vulnerable road users. Addressin...
Article
Commuting patterns are spatial interactions that result from the location decisions of firms, households, and the availability of transportation. Empirical evidence shows that these patterns differ across income groups, reflecting different levels of access to economic opportunities, such as jobs and modes of transportation. Accounting for this var...
Article
This research identified factors influencing the accuracy and variability of pavement surface evaluations and ratings (PASER). Survey and PASER data obtained from workshop participants were used to develop statistical models estimating three definitions of rater accuracy: (1) bias, which is the absolute value of the difference between a participant...
Article
As planners and engineers in large cities around the United States continue to seek solutions to transportation-related problems such as congestion, greenhouse gas emissions, and safe and efficient access to goods and services, light rail transit (LRT) systems have become an increasingly popular option. While LRT has the potential to address these...
Article
Full-text available
Transportation infrastructure is greatly impacted by ice and snow, adding enormous costs to the American economy. Because of their sustainability benefits, heated-pavement systems (HPS) continue to gain attention as a potential alternative to conventional snow removal operations, and the main goal of this paper is to assess the economic feasibility...
Article
This paper provides a review of studies published in peer-reviewed journals, conference proceedings, and technical academic and private sector reports on surveys about autonomous vehicles (AVs) from 2012 onward. The studies and respective surveys are categorized in this paper based on the study objectives and methodology applied. More than half of...
Poster
Cooperative Intelligent Transportation Systems (c-ITS) has been argued to be beneficial to the economic and environmental sustainability and add to the quality of life in urban cities. As the wide implementation of these systems demands significant investment, it is important to gauge public acceptability, before they come to implementation. To thi...
Article
Recent changes in the United States (U.S.) passenger rail policies have affected a number of National Railroad Passenger Corporation (Amtrak) corridors. One of the major changes is that, since the Passenger Rail Investment and Improvement Act (PRIIA) of 2008 was passed, all short-distance Amtrak corridors should become state-supported. Stakeholder...
Article
In US urban areas, traffic congestion remains a growing and costly problem. The Texas Transportation Institute estimated that in 2014 delays due to congestion caused an extra 7 billion extra hours in delay, leading to wasted fuel, increased environmental degradation, and high user costs. Previous studies have focused on the impacts to congestion vi...
Article
The journey to access a passenger rail station has been found to be an important factor in determining whether passengers choose rail as a transport mode alternative. Along with access to rail services, several factors make a transportation system more competitive and appealing to passengers and can influence users’ loyalty to the service, such as...
Article
Traditional trip distribution processes that rely heavily on gravity models fail to capture how the characteristics of individuals or the heterogeneity in the attributes of attraction zones may influence the accessibility to jobs and, therefore, journey-to-work patterns. Different approaches, such as destination choice models, are not generally app...
Article
Pedestrians are some of the most vulnerable road users as they are not protected by safety devices, and must also share the road with vehicles traveling at dangerous speeds, particularly during road crossings. In 2011, the state of Oregon changed their traffic laws to be more accommodating to pedestrians by giving right of way to pedestrians using...
Conference Paper
The first and last mile of a trip has been used to describe passenger travel with regards to getting to and from transit stops/stations. Solving the first and last mile (FMLM) problem extends the access to transportation systems and enlarges the number of passengers from a remote community, such as rural areas. The FMLM problem has been addressed i...
Article
The use of statistical models for analyzing traffic safety (crash) data has been well-established. However, time series techniques have traditionally been underrepresented in the corresponding literature, due to challenges in data collection, along with a limited knowledge of proper methodology. In recent years, new types of high-resolution traffic...
Technical Report
Full-text available
Ice and snow impact transportation infrastructure systems and add significant costs to the United States economy in the form of snow removal, damaged pavement, and lost productivity due to travel delays. As a result of environmental and logistics concerns associated with conventional snow removal systems (CSRS), the use of heated pavements systems...
Article
The peculiar nature of bridge condition data persistently poses challenges in prediction of bridge component deterioration that necessitate the continued investigation of probabilistic modeling techniques. These challenges include the uncertainty that characterizes bridge condition data due to the inherent random nature of deterioration factors and...
Article
In an effort to assist transportation professionals with the evaluation of wider economic benefits (WEB) of highway improvements, this paper provides important insights into the open-source AASHTO EconWorks wider economic benefits analysis tools using three case studies located in Indiana. The paper makes a significant contribution to the state of...
Article
The literature recognizes that the initial stages of a research project, including identifying and selecting a research topic, are the most challenging steps of project development for college students in the United States. Nevertheless, very limited literature exists on topic identification and selection, especially for undergraduate studies. TRB...
Article
An extensive body of research examines the relationship between transportation and economic activity in a region; however, many of the studies ignore the possible spatial interdependencies between regions. As a result, these studies may over-or underestimate the role that transportation plays on the economic activity of a region. This paper contrib...
Technical Report
Full-text available
Ice and snow impact transportation infrastructure systems and add significant costs to the United States economy in the form of snow removal, damaged pavement, and lost productivity due to travel delays. As a result of environmental and logistics concerns associated with conventional snow removal systems (CSRS), the use of heated pavements systems...
Article
Multivariate injury severity models that consider the cross-group heterogeneity in the crash data where individuals or occupants are nested within vehicles and vehicles are nested within crashes are limited in the literature. Most previous studies on crash injury severity were conducted at the crash level ignoring the potential correlation in sever...
Conference Paper
In this study, the Minneapolis–St. Paul International airport (MSP) in Minnesota, a representative large-hub airport (1% of total U.S. enplanements), was selected to assess the relative economic benefits of using heated pavement systems (HPS) for snow removal. Two approaches were adopted for defining the boundary conditions for economic assessments...
Conference Paper
Ridership on Midwest passenger rail lines has been steadily increasing over the past two decades. Between 2005 and 2014, there has been a growth of more than 65 percent, much higher than the national average (approximately 30 percent for the same years). Nevertheless, a number of lines have discontinued their services or are in danger of discontinu...
Article
This paper investigates the effects of segment length, line types, and imputed retroreflectivity values on pavement-marking retroreflectivity and crash frequency analyses. Road data, crash data, pavement condition data, and pavement-marking retroreflectivity data from Iowa Department of Transportation (DOT) databases were acquired and spatially int...
Article
Limited accessibility and mobility can result in decreased quality of life and well-being, as well as social exclusion. In the United States (U.S.), rural and small urban communities suffer from transport disadvantage due to a lack of transit and a low density of employment, education, recreation, and other opportunities. While the international li...
Technical Report
Full-text available
Methods for attracting driver’s attention either within or in advance of those work zones will be the study focus and the intent will be to provide a database that will comprehensively review solutions that will alert drivers entering work zones from previously conducted studies. The document will potentially assist INDOT in identifying and selecti...
Article
This paper presents a long-term investment planning model that co-optimizes infrastructure investments and operations across transportation and electric infrastructure systems for meeting the energy and transportation needs in the United States. The developed passenger transportation model is integrated within the modeling framework of a National L...
Conference Paper
The Midwest railroad network connected almost every major city by 1860, accounting for 36% of the United States (U.S.) railroad network mileage. Indiana became famous for the first Union Station in the world, as well as for one of the most developed and luxurious interurban rail system in the U.S. The twentieth century drastically transformed the p...
Technical Report
Full-text available
This 6-page publication discusses the transport situation in Indiana's rural counties and identifies the counties with the greatest transport challenges, that is, those counties with the largest gaps between needs and accessibility. Finally, it discusses the planning and policy implications for addressing the mismatch between transport needs and av...
Article
The vehicle-miles-traveled (VMT) fee has been widely suggested as an alternative funding mechanism to the current state of practice, the fuel tax per gallon. The VMT fee has drawn researchers’ and policy makers’ attention, particularly regarding its equity performance in various social groups. With the introduction of the concept of vulnerable hous...
Article
Full-text available
This paper investigates the effect of headlight type (daytime running lights, high beams, and modulating headlights) and rider color (bright yellow, blue denim, and black clothing and helmet) on the visual conspicuity of a motorcycle to younger (25 to 55 years old) and older drivers (65 and older) of a passenger vehicle in simulated urban and rural...
Article
This paper uses freight performance measure (FPM) data to assess quantitatively the local effects of an Interstate closure. The use of FPM data allows for an empirical analysis beyond traditional theoretical modeling, simulations, user surveys, windshield surveys, and manual traffic counts. Specifically, this paper presents a case study of the loca...
Article
Full-text available
Professor Karlaftis did extensive work in the areas of urban transportation, transportation planning and operations, and emergency response. He had an affinity for statistics and optimization, so most of his work was quantitatively driven. He was a coauthor of an international bestselling book on transportation econometrics and statistics, two text...
Article
While there have been many studies analyzing crash severity, few studies have accounted for unobserved heterogeneity and compared different crash severity models. The objective of this paper is to investigate the differences between two preferred methods for accommodating individual unobserved heterogeneity, the mixed logit and latent class methods...
Article
The evaluation of driver behavior in dilemma zones is of critical importance to traffic safety and intersection design, but has thus far received limited investigation. Internal and external factors that can influence this behavior include driver demographics, the use of technology in the vehicle, and even the type of dilemma zone—Type I (based on...
Conference Paper
The development of a nationwide commuter and high-speed rail (HSR) network has been suggested as a promising and "greener" passenger transport solution with the potential to reduce energy consumption and greenhouse gas emissions, given efficient planning that will ensure sufficient ridership and sustainable investment. It is anticipated that passen...
Article
Unobserved heterogeneity has been recognized as a critical issue in traffic safety research that has not been completely addressed or often overlooked, and can lead to biased estimates and incorrect inferences if inappropriate methods are used. This paper uses a latent class approach to investigate the factors that affect crash severity outcomes in...
Article
Traffic safety culture does not merely focus on risky behaviors and their consequences, but also on change in social norms, values, and beliefs. Past research has recommended establishing a comprehensive program to shape a safer traffic safety culture in the United States. In 2011, a cell phone and landline survey regarding traffic safety culture w...
Article
The paper models and compares driving behavior and vehicular emissions at a roundabout. Four drivers drove a vehicle instrumented with a GPS data logger over a study route. Second-by-second vehicle positions were recorded for various runs. Speed profiles of drivers were modeled using a Bayesian inference methodology. Circulating speed and maximum a...
Article
Full-text available
Iowa is a state rich in renewable energy resources, especially biomass. The successful development of renewable energy industry in Iowa is concomitant with increase in freight traffic and is likely to have significant impacts on transportation infrastructure condition and increased maintenance expenses for the state and local governments. The prima...
Article
Full-text available
Deer-vehicle crashes are a growing problem in Iowa where deer-vehicle crashes represent 13% of all crashes reported. In 2009, these crashes resulted in nine fatalities and 451 injuries in the state. Deer-vehicle crashes are a problem even in urban areas of Iowa. It is known that deer-vehicle crashes are typically underreported. To address this unde...
Article
Anthropogenic carbon dioxide (CO2) emissions and the resulting influence on global climate change have motivated nations throughout the world to reconsider how we obtain, move, and utilize energy. Use of the Sankey diagrams produced annually by Lawrence Livermore National Labs (see https://flowcharts.llnl.gov) indicates that in 2011, energy harvest...
Article
â–º Effects of different technological solutions and changes in fuel prices on passenger VMT by functional class and area. â–º Effects of different policies governing fuel tax and population density on future energy consumption and GHG emissions. â–º Significant heterogeneity in VMT of different population groups across states and over time. â–º No...
Article
This paper proposes a methodology that can be applied to evaluate the environmental and energy impacts of a de novo technology, the Automated Electric Highway Systems (AEHS). The authors used the Motor Vehicle Emission Simulator (MOVES) program to estimate the impacts on emissions and energy use associated with a hypothetical implementation of this...
Article
This paper investigates the physical and fiscal impacts of Iowa's existing biofuel plants and wind power industries. A four-county cluster in northern Iowa and a two-county cluster in southern Iowa were identified through a local agency survey as having a large number of diverse facilities and were selected for analysis of traffic and physical impa...
Chapter
The federal government is aggressively promoting biofuels as an answer to global climate change and dependence on imported energy sources. As a result, ethanol production in the United States (U.S.) grew at an annual rate of 32% between 2005 and 2008 spurred on by the U.S. Department of Energy’s goal of having 20% of U.S. transportation fuels to co...
Article
This paper investigates potential gender and age differences in conviction and crash occurrence subsequent to being directed to attend Iowa's Driver Improvement Program (DIP). Binary logit models were developed to investigate the factors that influence conviction occurrence after DIP by gender and age. Because of the low crash occurrence subsequent...
Article
Full-text available
This paper proposes methodologies to estimate the electric energy and power consumption by light-duty plug-in electric vehicles (PEVs). Using the travel patterns of light-duty vehicles in the U.S. obtained from the 2009 National Household Travel Survey, the PEVs' energy and power consumption are estimated for two uncontrolled charging scenarios.
Article
This paper studies public transport demand by estimating a system of equations for multimodal transit systems where different modes may act competitively or cooperatively. Using data from Athens, Greece, we explicitly correct for higher-order serial correlation in the error terms and investigate two, largely overlooked, questions in the transit lit...