Erik Jenelius

Erik Jenelius
KTH Royal Institute of Technology | KTH · Department of Civil and Architectural Engineering

PhD

About

120
Publications
56,020
Reads
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4,223
Citations
Citations since 2016
82 Research Items
3495 Citations
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20162017201820192020202120220200400600
20162017201820192020202120220200400600
20162017201820192020202120220200400600
Introduction
Erik Jenelius is Associate Professor of Public Transport Systems and Docent in Transport Science at KTH Royal Institute of Technology, Sweden. His research interests include data-driven traffic and mobility management, transportation network and resilience analysis, and transit systems planning and operations.
Additional affiliations
May 2018 - present
KTH Royal Institute of Technology
Position
  • Professor (Associate)
Description
  • Associate Professor in Public Transport Systems
April 2015 - April 2018
KTH Royal Institute of Technology
Position
  • Professor (Assistant)
February 2011 - March 2015
KTH Royal Institute of Technology
Position
  • Researcher
Education
June 2006 - January 2011
KTH Royal Institute of Technology
Field of study
  • Infrastructure

Publications

Publications (120)
Article
Full-text available
This paper formulates the car-specific metro train crowding prediction problem based on real-time load data and evaluates the performance of several data-driven prediction methods (lasso, stepwise regression, and boosted tree ensembles). Two variants of the prediction problem are considered: 1) train-centered prediction, focusing on in-vehicle crow...
Article
Full-text available
We propose a methodology based on multiple automated data sources for evaluating the effects of station layout, arriving traveler flows, and platform and on-board crowding on the distribution of boarding passengers between individual cars of metro trains. The methodology is applied to a case study for a sequence of stations in the Stockholm metro n...
Article
Full-text available
The paper proposes a methodology for providing personalized, predictive in-vehicle crowding information to public transport travellers via mobile applications or at-stop displays. Three crowding metrics are considered: (1) the probability of getting a seat on boarding, (2) the expected travel time standing, and (3) the excess perceived travel time...
Article
Full-text available
The deployment of autonomous buses (AB) is expected to have consequences for service design facilitated by its cost function structure. We study the impacts of AB deployment in line-based public transport (PT) systems. In particular, we examine the transition phase where AB is sequentially deployed, involving the selection of lines for which AB wil...
Article
Full-text available
This paper develops a method for analysing the elasticity of travel demand to public transport fares. The methodology utilizes public transport smartcard data for collecting disaggregate full population data about passengers’ travel behaviour. The study extends previous work by deriving specific fare elasticities for distinct socioeconomic (e.g., c...
Article
Full-text available
Overcrowding has become a big challenge for public transport systems, affecting passengers’ travel experience. At the same time, service supply is often underutilized due to large variations in crowding across services, vehicle trips on the same service and different compartments of the same vehicle. Real-time operational measures, such as informat...
Preprint
Full-text available
Over the past decade, there has been a surge of interest in the transport community in the application of agent-based simulation models to evaluate flexible transit solutions characterized by different degrees of short-term flexibility in routing and scheduling. A central modeling decision in the development of an agent-based simulation model for t...
Article
Self-driving technology may lead to a paradigm shift for the transport industry with shared cars available to every-one. However, this vision has increasingly been challenged as too optimistic and unsubstantiated. In this study we explore societal impacts of using this technology for both cars and public transport and investigate differences depend...
Article
Full-text available
Numerous studies have studied the impacts of automated driving (AD) technology on e.g. accident rates or CO2 emissions using various frameworks. In this paper we present an overview of previous frameworks used for societal impacts and review their advantages and limitations. Additionally, we introduce the Total Impact Assessment (TIA) framework dev...
Chapter
A consistent pattern that emerged out of the consequences of COVID-19 is that public transport was hit particularly hard compared to private cars and other modes. This raises concern regarding the future of public transport and the sustainability of urban transport. While the current clash of challenges, trends and disruptions makes the future more...
Preprint
Full-text available
Recent developments in modular transport vehicles allow deploying multi-purpose vehicles which can alternately transport different kinds of flows. In this study, we propose a novel variant of the pickup and delivery problem, the multi-purpose pickup and delivery problem, where multi-purpose vehicles are assigned to serve a multi-commodity flow. We...
Preprint
Full-text available
The continuous increase in urban deliveries and the ongoing urbanization of large cities require the development of efficient and sustainable transportation solutions. This study investigates the impact of modular vehicle concepts and the consolidation of different demand types in the route planning on the efficiency of the urban freight and passen...
Preprint
Full-text available
Access distance to micromobility services is an important component of usage patterns and input to determine the catchment area for the service. The latter is increasingly relevant as policymakers consider regulating shared free-floating e-scooters to designated parking zones. The access distances of e-scooters users in Stockholm, Sweden, are studi...
Preprint
Full-text available
The introduction of automated vehicles (AVs) is commonly expected to improve different aspects of transportation. A long transition period where AVs will coexist with human-driven vehicles (HVs) is expected until AVs become prevalent. Using the open source microscopic traffic simulation tool SUMO, this study investigates the impacts on traffic perf...
Article
Autonomous vehicles (AVs) are becoming a reality and may integrate with existing public transport systems to enable the new generation of autonomous public transport. It is vital to understand what are the alternatives for AV integration from different angles such as costs, emissions, and transport performance. With the aim to support AV integratio...
Article
Full-text available
The maturing of autonomous driving technology in recent years has led to several pilot projects and the initial integration of autonomous pods and buses into the public transport (PT) system. An emerging field of interest is the design of public transport networks operating autonomous buses and the potential to attract higher levels of travel deman...
Preprint
Full-text available
Pattern recognition or spatio-temporal clustering is essential to scenario-based traffic management. "Typical" or representative day-types capture how the traffic patterns have looked and as the new days can be like or develop. This paper looks at daily pattern recognition, where daily traffic patterns are captured in dynamic Origin-Destination (OD...
Article
Full-text available
Different urban transportation flows (e.g., passenger journeys, freight distribution, and waste management) are conventionally separately handled by corresponding single-purpose vehicles (SVs). The multi-purpose vehicle (MV) is a novel vehicle concept that can enable the sequential sharing of different transportation flows by changing the so-called...
Article
Full-text available
This paper proposes a linear mixed model of route speed distributions that separates the variability into an intertraveller component, consistent across days and time intervals for each recurrent traveller, and an intratraveller component representing uncertainty. The intratraveller variability corresponds to travel time uncertainty, while the tota...
Article
Full-text available
The paper investigates the efficiency of serving high demand transit corridors with connected semi-autonomous bus platoons in both bus and BRT services. Platooning facilitates higher capacity than conventional buses by forming virtual long buses out of multiple smaller vehicles, which may be particularly relevant in scenarios with large demand vari...
Chapter
This chapter introduces a framework for understanding rail transport resilience that incorporates supply shocks as well as positive and negative demand shocks. It focuses on demand disruptions with particular attention to the COVID-19 pandemic. Demand shocks can occur due to special events or various forms of societal upheaval and crises. The class...
Article
Full-text available
Introduction The COVID-19 pandemic has changed travel behaviour and reduced the use of public transport throughout the world, but the reduction has not been uniform. In this study we analyse the propensity to stop travelling by public transport during COVID-19 for the holders of 1.8 million smart cards in Stockholm, Sweden, for the spring and autum...
Article
Full-text available
Cities across the world are becoming more engaged in tackling climate change and contributing to the achievement of international agreements. The city of Curitiba in Brazil is no exception. In December 2020, the city published PlanClima (Plano Municipal de Mitigação e Adaptação às Mudanças Climáticas), a climate plan developed with local and intern...
Article
Full-text available
The paper develops a simulation model and evaluates fixed versus on-demand operational designs of a station-based automated feeder service. The evaluation considers the operational cost and average passenger level-of-service trade-offs as well as distributional differences in waiting times. Two case studies are used to evaluate such trade-offs unde...
Article
Full-text available
This paper evaluates the impact of vehicle automation and electrification on the applicability of fixed routes and door-to-door services to supply a feeder transit solution in suburban areas. These technologies will modify the current cost structure of the bus system depending on how mature they are, reducing operating costs and increasing capital...
Preprint
Full-text available
Recognition of spatio-temporal traffic patterns at the network-wide level plays an important role in data-driven intelligent transport systems (ITS) and is a basis for applications such as short-term prediction and scenario-based traffic management. Common practice in the transport literature is to rely on well-known general unsupervised machine-le...
Article
Full-text available
Holding has been extensively used as control strategy to regulate public transport operations, especially to maintain even headways and prevent buses of the same line to bunch up. Applying holding to multiple lines requires however to deal with the transition between corridor and branching segments. In this study, we introduce a holding criterion f...
Preprint
Full-text available
In the last years, a new generation of shared micromobility systems has rapidly proliferated in urban areas. Their distinctive characteristics are dockless security systems, electric power assistance and a new device, the e-scooter. The technological advances combined with the lack of regulations reduce implementation costs and expand potential dem...
Preprint
Full-text available
This paper evaluates the impact of vehicle automation and electrification on the applicability of fixed routes and door-to-door services to supply a feeder transit solution in suburban areas. These technologies will modify the current cost structure of the bus system depending on how mature they are, reducing operating costs and increasing capital...
Article
Full-text available
High-capacity public transport services such as metro and commuter trains are efficient during normal operations but are vulnerable to disruptions. To manage disruptions, bridging buses are commonly called in to replace the rail-based service along the disrupted lines. These often take significant time to arrive and are costly to keep stand-by. Dem...
Chapter
Full-text available
The transport system is critical to society. This is clearly demonstrated when the system is exposed to a shock. We discuss the significance of transport resilience and the related concepts of risk and vulnerability. Shocks to the transport system can be internal or external, natural or human-made, intentional or unintentional. Different transport...
Article
Full-text available
As travel demand grows in many cities around the world, overcrowding in public transport systems has become a major issue and has many negative effects for both users and operators. Measures to address on-board congestion span from large-scale strategic investments (e.g. increasing infrastructure capacity), through tactical planning (e.g. stopping...
Article
Full-text available
The paper analyses the impacts of COVID-19 on daily public transport ridership in the three most populated regions of Sweden (Stockholm, Västra Götaland and Skåne) during spring 2020. The analysis breaks down the overall ridership with respect to ticket types, youths and seniors, and transport modes based on ticket validations, sales and passenger...
Article
Full-text available
The paper analyses the impacts of COVID-19 on daily public transport ridership in the three most populated regions of Sweden (Stockholm, Västra Götaland and Skåne) during spring 2020. The analysis breaks down the overall ridership with respect to ticket types, youths and seniors, and transport modes based on ticket validations, sales and passenger...
Preprint
Full-text available
This chapter introduces a framework for understanding rail transport resilience that incorporates supply shocks as well as positive and negative demand shocks. We focus on demand disruptions with particular attention to the COVID-19 pandemic. Demand shocks can occur due to special events or various forms of societal upheaval and crises. We classify...
Preprint
Full-text available
This paper investigates to what degree the vehicles traversing a route during the morning or evening peak over multiple days are recurrent travellers. The paper proposes a model of route speed distributions that separates the variability into a traveller-to-traveller component, consistent across days and time intervals, and a within-traveller compo...
Preprint
Full-text available
The COVID-19 pandemic has changed travel behaviour and reduced the use of public transport throughout the world, but the reduction has not been uniform. In this study we analyse the propensity to stop travelling by public transport during COVID-19 for the holders of 1.8 million smart cards in Stockholm, Sweden. We suggest two models for explaining...
Preprint
Full-text available
This paper develops a method for analysing the elasticity of travel demand to public transport fares. The methodology utilizes public transport smartcard data for collecting disaggregate, full population data about passengers’ travel behaviour. The study extends previous work by deriving specific fare elasticities for distinct socioeconomic (e.g.,...
Chapter
Full-text available
The transport system is an infrastructure that is critical to society. This is clearly demonstrated when the system is exposed to a shock. We discuss the significance of transport resilience and the related concepts of risk and vulnerability. Shocks to the transport system can be internal or external, natural or human-made, intentional or unintenti...
Conference Paper
Full-text available
We introduce a rule based multiline holding criterion for regularity in branch and trunk networks accounting for all passenger groups. On the shared transit corridor, we consider synchronization at the merging or the diverging stop. The decision between holding for regularity or synchronization is taken by comparing the expected passenger cost of e...
Article
Full-text available
This paper presents a comparative analysis of demand-responsive and fixed-schedule, fixed route operations for a simplified station-based feeder to mass transit scenario. Traffic dynamics, demand-responsive fleet coordination, and the behaviour of individual transit users are represented using a public transit simulation framework. Each operational...
Article
Full-text available
The arrival of automated vehicles could significantly reduce the operating cost of mobility services. This fact has encouraged researchers to propose door-to-door services instead of the current fixed routes. However, a comparison between these two alternatives is required in order to identify when (depending on the development degree of the automa...
Preprint
Full-text available
This paper establishes mild probability-theoretical conditions under which observations of space-averaged speed and occupancy in some area concentrate with low scatter around a well-defined curve. These conditions are validated against empirical data from Stockholm and Geneva. No equilibrating process is required to be in operation.
Conference Paper
Full-text available
For large cities, public transport represents the backbone for commuters and thus plays a crucial role for society and for the economy. High-capacity public transport services such as metro and commuter trains are efficient during normal operations but are vulnerable to disruptions. Metro and commuter train disruptions can be handled in several way...
Article
Transportation networks are inherently uncertain due to random disruptions; meanwhile, real-time information potentially helps travelers adapt to realized traffic conditions and make better route choices under such disruptions. Modeling adaptive route choice behavior is essential in evaluating real-time traveler information systems and related poli...
Poster
Full-text available
The dynamic behavior of urban mobility patterns makes matching taxi supply with demand as one of the biggest challenges in this industry. Recently, the increasing availability of massive broadcast GPS data has encouraged the exploration of this issue under different perspectives. One possible solution is to build a data-driven real-time taxi-dispat...
Article
Full-text available
Automation technology is expected to change the public transport sector radically in the future. One rising issue is whether to embrace the intermediate stage of semi-autonomous buses or to wait until fully autonomous buses are available. This paper proposes a cost model of bus operations considering automation technology. The generalized cost, whi...
Poster
Full-text available
City-wide travel time prediction in real-time is an important enabler for efficient use of the road network. It can be used in traveler information to enable more efficient routing of individual vehicles as well as decision support for traffic management applications such as directed information campaigns or incident management. 3D speed maps have...
Conference Paper
Full-text available
The paper addresses the bus crowding prediction problem based on real-time vehicle location and passenger count data and evaluates the performance of a data-driven lasso regression prediction method. The problem is studied for a high-frequency bus line in Stockholm, Sweden. Prediction accuracy is evaluated with respect to absolute passenger loads a...
Article
Full-text available
Tunnel congestion is an important safety problem and is often dealt with using disruptive traffic management strategies, such as closures. The paper proposes an approach to identify the underlying causes of recurrent congestion in tunnels and tests the hypothesis that the cause may vary from day to day. It also suggests that the appropriate tunnel...
Article
Full-text available
Massive data broadcast by GPS-equipped vehicles provide unprecedented opportunities. One of the main tasks in order to optimize our transportation networks is to build data-driven real-time decision support systems. However, the dynamic environments where the networks operate disallow the traditional assumptions required to put in practice many off...
Article
Full-text available
Disruptions in public transport networks (PTNs) often lead to partial capacity reductions rather than complete closures. This study aims to move beyond the vulnerability analysis of complete failures by investigating the impacts of a range of capacity reductions on PTN performance. The relation between network performance and the degradation of lin...
Article
Full-text available
In transit corridors, multiple lines share a sequence of consecutive stops to provide higher joint frequency in higher demand areas. A key challenge is to coordinate the transition from single line to joint operation. A holding control strategy aimed at minimizing passenger travel times is introduced for lines merging into a shared corridor, accoun...
Conference Paper
Full-text available