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Cats, O. (2019). Determinants of Bus Riding Time Deviations: Relationship between Driving Patterns and Transit Performance. JOURNAL OF TRANSPORTATION ENGINEERING PART A-SYSTEMS, 145(1), Article ID 04018078.
Open this publication in new window or tab >>Determinants of Bus Riding Time Deviations: Relationship between Driving Patterns and Transit Performance
2019 (English)In: JOURNAL OF TRANSPORTATION ENGINEERING PART A-SYSTEMS, ISSN 2473-2907, Vol. 145, no 1, article id 04018078Article in journal (Refereed) Published
Abstract [en]

Urban bus services e subject to high levels of uncertainty and disturbances. Methods to determine the timetable are designed to absorb variations in riding times between stops by allocating additional travel time. The propagation of service unreliability along the route could be restrained by drivers' adjustment at stops and between stops. This paper analyzes the main determinants of bus riding times deviations based on automatic vehicle location (AVL) data from four trunk lines in Stockholm, Sweden. The analysis indicates that drivers can and do adjust their speeds in response to instantaneous real-time schedule adherence information, although these adjustments depend on the underlying control scheme: locations where the performance is measured. A model for bus riding time deviations was estimated with autoregressive effects, performance indicators, link characteristics, and trip attributes as the explanatory factors. The results can support the development of travel time prediction and real-time control strategies that take drivers' response to operations into account. This highlights the importance of the human factor in designing control schemes and the corresponding transit performance evaluation.

Place, publisher, year, edition, pages
ASCE-AMER SOC CIVIL ENGINEERS, 2019
Keywords
Public transportation, Delay time, Bus vehicles, Time factors, Driver behavior, Scheduling
National Category
Transport Systems and Logistics
Identifiers
urn:nbn:se:kth:diva-239745 (URN)10.1061/JTEPBS.0000201 (DOI)000450405700002 ()2-s2.0-85055948793 (Scopus ID)
Note

QC 20190109

Available from: 2019-01-09 Created: 2019-01-09 Last updated: 2019-01-09Bibliographically approved
Laskaris, G., Cats, O., Jenelius, E., Rinaldi, M. & Viti, F. (2019). Multiline holding based control for lines merging to a shared transit corridor. Transportmetrica B: Transport Dynamics, 7(1), 1062-1095
Open this publication in new window or tab >>Multiline holding based control for lines merging to a shared transit corridor
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2019 (English)In: Transportmetrica B: Transport Dynamics, ISSN 2168-0566, Vol. 7, no 1, p. 1062-1095Article in journal (Refereed) Published
Abstract [en]

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, accounting for the coordination of vehicle arrivals from the merging lines as well as the regularity of each line. The criterion is tested using an artificial network and a real-world network to analyze the impact of demand distribution and compare cooperative versus single line control. We illustrate how the real-time strategy yields overall passenger gains, depending on the composition of different user groups. Results are assessed based on operation and passenger performance indicators and show that coordination is achieved. When combined with joint control in the common part, the proposed approach achieves consistent network-wide travel time benefits.

Place, publisher, year, edition, pages
Taylor & Francis, 2019
Keywords
Line coordination; corridor management; fork line operations; holding control
National Category
Transport Systems and Logistics
Identifiers
urn:nbn:se:kth:diva-251688 (URN)10.1080/21680566.2018.1548312 (DOI)000466354800001 ()
Funder
VinnovaTrenOp, Transport Research Environment with Novel Perspectives
Note

QC 20190520

Available from: 2019-05-19 Created: 2019-05-19 Last updated: 2019-05-20Bibliographically approved
Abenoza, R. F., Liu, C., Cats, O. & Susilo, Y. (2019). What is the role of weather, built-environment and accessibility geographical characteristics in influencing travelers’ experience?. Transportation Research Part A: Policy and Practice, 122, 34-50
Open this publication in new window or tab >>What is the role of weather, built-environment and accessibility geographical characteristics in influencing travelers’ experience?
2019 (English)In: Transportation Research Part A: Policy and Practice, ISSN 0965-8564, E-ISSN 1879-2375, Vol. 122, p. 34-50Article in journal (Refereed) Published
Abstract [en]

We examine the effect of weather, accessibility and built-environment characteristics on overall travel experience as well as the experience with the latest trips. These are factors that are often disregarded in the travel satisfaction literature even though they are believed to largely influence the first mile of the door-to-door trip. This study fills a research gap in investigating all these factors by using, amongst other, a relatively large travel satisfaction survey from years 2009 to 2015 and by focusing on urban and peri-urban geographical contexts, the city and county of Stockholm (Sweden), respectively. The ordered logit model results show that county dwellers living close to a metro station and in well linked-to-all areas report higher overall travel satisfaction evaluations. In addition, precipitation and ground covered with snow have a negative influence on travel satisfaction. Our findings indicate that built-environment characteristics exert a rather weak influence on the travel experience, especially in the peri-urban context. However, some aspects such as living in areas with medium densities, low income and with high safety perceptions around public transport stations are associated with higher satisfaction levels. In turn, areas with single land uses are found to have lower travel satisfactions. These results are important for public transport planners and designers in devising measures to prevent and mitigate the negative outcome of some weather conditions and to conceive better designed transit oriented developments.

Place, publisher, year, edition, pages
Elsevier, 2019
Keywords
Accessibility, Built-environment, Customer satisfaction, First and last-mile, Ordered logit models, Weather
National Category
Transport Systems and Logistics
Identifiers
urn:nbn:se:kth:diva-246456 (URN)10.1016/j.tra.2019.01.026 (DOI)000465061400003 ()2-s2.0-85061906067 (Scopus ID)
Funder
Integrated Transport Research Lab (ITRL)
Note

QC 20190320

Available from: 2019-03-20 Created: 2019-03-20 Last updated: 2019-06-17Bibliographically approved
Abenoza, R., Cats, O. & Susilo, Y. (2018). How does travel satisfaction sum up?: Decomposing the door-to-door experience for multimodal trips. Transportation, 46(5), 1615-1642
Open this publication in new window or tab >>How does travel satisfaction sum up?: Decomposing the door-to-door experience for multimodal trips
2018 (English)In: Transportation, ISSN 0049-4488, E-ISSN 1572-9435, Vol. 46, no 5, p. 1615-1642Article in journal, Editorial material (Other academic) Published
Abstract [en]

Understanding how satisfaction with individual trip legs aggregates to the overall travel experience for different types of trips will enable the identification of the trip legs that are most impactful. For this purpose we analyze data on retrospective evaluations of entire multi-modal trip experiences and satisfaction with individual trip legs. We formulate and describe alternative aggregation rules and underpin them in theory and previous empirical findings. The results of a series of regression models show that for a large number of multi-modal trip configurations normative rules can better reproduce overall travel satisfaction than heuristic rules. This indicates that all trip legs need to be considered when evaluating the overall travel experience, especially for trips legs involving waiting and/or transferring time. In particular, weighting satisfaction with individual trip legs with perceived trip leg durations yielded the best predictor of overall travel satisfaction. No evidence for a disproportional effect of the last or most exceptional part of the trip was found. This research contributes to the literature on combining multi-episodic experiences and provides novel empirical evidence in the transport domain. 

Place, publisher, year, edition, pages
Springer, 2018
Keywords
Customer Satisfaction, Public Transport, Trip legs, Multimodal trips
National Category
Transport Systems and Logistics
Research subject
Transport Science
Identifiers
urn:nbn:se:kth:diva-200729 (URN)10.1007/s11116-018-9860-0 (DOI)000491070300004 ()2-s2.0-85041502425 (Scopus ID)
Note

QC 20170202

Available from: 2017-02-01 Created: 2017-02-01 Last updated: 2019-11-11Bibliographically approved
Abenoza, R., Cats, O. & Susilo, Y. (2018). Investigating the nature of Public Transport service attributes. Transportation Science
Open this publication in new window or tab >>Investigating the nature of Public Transport service attributes
2018 (English)In: Transportation Science, ISSN 0041-1655, E-ISSN 1526-5447Article in journal, Editorial material (Refereed) Submitted
Abstract [en]

Classifying public transport service attributes based on their influence on overall traveler satisfaction can assist stakeholders and practitioners in introducing cost-efficient measures. To date most studies employed methods that were based on the assumption that the impact of service attributes on traveler satisfaction is entirely linear and symmetric. This study examines whether service attributes have a non-linear and asymmetric influence on the overall travel experience by employing the Three-factor theory (basic, performance and exciting factors). The analysis is conducted for different traveler segments depending on their level of captivity, travel frequency by public transport and travel mode used, and is based on a relatively large sample size collected for Stockholm County. Moreover, the estimated models control for important socio-demographic and travel characteristics that have been insofar overlooked. Results are presented in the form of a series of multi-level cubes that represent different essentiality of traveler needs which provide a useful methodological framework to further design quality service improvements that can be applied to various geographical contexts. Our findings highlight that a “one size fits all” approach is not adequate for identifying the needs of distinct traveler segments and of travelers using different travel modes. Furthermore, two-thirds of the attributes are consistently classified into the same factor category which entails important policy implications. This research deepens and expands the very limited knowledge of the application of the three-factor theory in the transport field.

Keywords
Public Transport, customer satisfaction, three-factor theory
National Category
Transport Systems and Logistics
Research subject
Transport Science
Identifiers
urn:nbn:se:kth:diva-240427 (URN)
Funder
Stockholm County Council, 20160903
Note

QC 20181218

Available from: 2018-12-19 Created: 2018-12-19 Last updated: 2018-12-19Bibliographically approved
Cats, O., Susilo, Y. O. & Reimal, T. (2018). The prospects of fare-free public transport: evidence from Tallinn (vol 44, pg 1083, 2017). Transportation, 45(5), 1601-1602
Open this publication in new window or tab >>The prospects of fare-free public transport: evidence from Tallinn (vol 44, pg 1083, 2017)
2018 (English)In: Transportation, ISSN 0049-4488, E-ISSN 1572-9435, Vol. 45, no 5, p. 1601-1602Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Springer, 2018
National Category
Transport Systems and Logistics
Identifiers
urn:nbn:se:kth:diva-234578 (URN)10.1007/s11116-017-9785-z (DOI)000442622200018 ()2-s2.0-85019661110 (Scopus ID)
Note

QC 20180919

Available from: 2018-09-19 Created: 2018-09-19 Last updated: 2018-09-19Bibliographically approved
Fadaei Oshyani, M., Cats, O. & Bhaskar, A. (2017). A hybrid scheme for real-time prediction of bus trajectories: Hybrid Scheme for Real-Time Prediction. Journal of Advanced Transportation, 50(8), 2130-2149
Open this publication in new window or tab >>A hybrid scheme for real-time prediction of bus trajectories: Hybrid Scheme for Real-Time Prediction
2017 (English)In: Journal of Advanced Transportation, ISSN 0197-6729, E-ISSN 2042-3195, Vol. 50, no 8, p. 2130-2149Article in journal (Refereed) Published
Abstract [en]

The uncertainty associated with public transport services can be partially counteracted by developing real-time models to predict downstream service conditions. In this study, a hybrid approach for predicting bus trajectories by integrating multiple predictors is proposed. The prediction model combines schedule, instantaneous and historical data. The contribution of each predictor as well as values of respective parameters is estimated by minimizing the prediction error using a linear regression heuristic.The hybrid method was applied to five bus lines in Stockholm, Sweden and Brisbane, Australia. The results indicate that the hybrid method consistently outperforms the timetable and delay conservation prediction method for different line layouts, passengerdemands and operation practices.Model validation confirms model transferability and real-time applicability. Generating more accurate predictions can helpservice users adjust their travel plans and service providers to deploy proactive management and control strategies to mitigate the negative effects of service disturbances.

Place, publisher, year, edition, pages
John Wiley & Sons, 2017
Keywords
travel time prediction, hybrid model, real-time information, vehicle trajectory, bus reliability, linear regression heuristic
National Category
Transport Systems and Logistics
Identifiers
urn:nbn:se:kth:diva-203964 (URN)10.1002/atr.1450 (DOI)000401555900034 ()2-s2.0-85014802731 (Scopus ID)
Note

QC 20170328

Available from: 2017-03-21 Created: 2017-03-21 Last updated: 2017-06-09Bibliographically approved
West, J. & Cats, O. (2017). Individual and Synergetic Effects of Transit Service Improvement Strategies: Simulation and Validation. Journal of transportation engineering, 143(6), Article ID 04017061.
Open this publication in new window or tab >>Individual and Synergetic Effects of Transit Service Improvement Strategies: Simulation and Validation
2017 (English)In: Journal of transportation engineering, ISSN 0733-947X, E-ISSN 1943-5436, Vol. 143, no 6, article id 04017061Article in journal (Refereed) Published
Abstract [en]

Assessment of transit service improvements such as bus lanes, allowing boarding through all doors, and headway-based holding control requires detailed simulation capabilities. However, because the usage of models advanced enough to simultaneously analyze physical and operational measures has been limited, their validity has hitherto remained low. This paper assesses the implementation of several bus service improvement measures in a simulation model. The paper analyzes the effect of isolated and combinations of measures, and validates the model using field experiment data. The model predicted travel time improvements accurately (1–2% difference), while overestimating some of the headway variability effects. The three tested measures exercised negative synergy effects, with their combined effect being smaller than the sum of their marginal contributions, except for headway-based holding, which exercised positive synergy effects with the two other measures.

Place, publisher, year, edition, pages
American Society of Civil Engineers (ASCE), 2017
National Category
Transport Systems and Logistics
Research subject
Transport Science
Identifiers
urn:nbn:se:kth:diva-168295 (URN)10.1061/JTEPBS.0000095 (DOI)000417336200004 ()
Funder
Stockholm County Council
Note

QC 20150601

Available from: 2015-06-01 Created: 2015-06-01 Last updated: 2018-01-03Bibliographically approved
Gentile, G. & Cats, O. (2017). Introduction to the special issue on public transport modelling. EURO Journal on Transportation and Logistics, 6(3), 219-220
Open this publication in new window or tab >>Introduction to the special issue on public transport modelling
2017 (English)In: EURO Journal on Transportation and Logistics, ISSN 2192-4376, E-ISSN 2192-4384, Vol. 6, no 3, p. 219-220Article in journal, Editorial material (Other academic) Published
Place, publisher, year, edition, pages
SPRINGER HEIDELBERG, 2017
National Category
Transport Systems and Logistics
Identifiers
urn:nbn:se:kth:diva-215466 (URN)10.1007/s13676-017-0107-6 (DOI)000411125100001 ()2-s2.0-85064288960 (Scopus ID)
Note

QC 20171017

Available from: 2017-10-17 Created: 2017-10-17 Last updated: 2019-05-16Bibliographically approved
Cats, O. & Gkioulou, Z. (2017). Modelling the Impacts of Public Transport Reliability and Travel Information on Passengers’ Waiting Time Uncertainty. EURO Journal on Transportation and Logistics, 6(3)
Open this publication in new window or tab >>Modelling the Impacts of Public Transport Reliability and Travel Information on Passengers’ Waiting Time Uncertainty
2017 (English)In: EURO Journal on Transportation and Logistics, ISSN 2192-4376, E-ISSN 2192-4384, Vol. 6, no 3Article in journal (Refereed) Published
Abstract [en]

Public transport systems are subject to uncertainties related to traffic dynamic, operations, and passenger demand. Passenger waiting time is thus a random variable subject to day-to-day variations and the interaction between vehicle and passenger stochastic arrival processes. While the provision of real-time information could potentially reduce travel uncertainty, its impacts depend on the underlying service reliability, the performance of the prognosis scheme, and its perceived credibility. This paper presents a modeling framework for analyzing passengers’ learning process and adaptation with respect to waiting-time uncertainty and travel information. The model consists of a within-day network loading procedure and a day-to-day learning process, which are implemented in an agent-based simulation model. Each loop of within-day dynamics assigns travelers to paths by simulating the progress of individual travelers and vehicles as well as the generation and dissemination of travel information. The day-to-day learning model updates the accumulated memory of each traveler and updates consequently the credibility attributed to each information source based on the experienced waiting time. A case study in Stockholm demonstrates model capabilities and emphasizes the importance of behavioral adaptation when evaluating alternative measures which aim to improve service reliability.

Place, publisher, year, edition, pages
Springer Berlin/Heidelberg, 2017
National Category
Transport Systems and Logistics
Identifiers
urn:nbn:se:kth:diva-165839 (URN)10.1007/s13676-014-0070-4 (DOI)000411125100003 ()
Note

QP 201505

QC 20171009

Available from: 2015-04-29 Created: 2015-04-29 Last updated: 2017-10-09Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-4506-0459

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