Niels van Oort
Autonomous vehicles meet Public Transport: the future of automated vehicles in public transport
The technology of automated vehicles is developing rapidly and the vehicles offer a lot of benefits. They claim to be safer, more environmentally friendly and they can provide transport for everyone, including people who currently don’t have access to transportation. The focus seemed to be on the development of automated private vehicles, but the focus seems to shift from private transportation to automated public transportation.
The Netherlands has been pro-active in testing automated vehicles on public roads. This paper gives an overview of the projects and pilots with automated vehicles as public transport in the Netherlands as well as the remaining research questions. Also, preliminary results of passenger related studies regarding expected ridership and perception are discussed in this paper. Information was gathered by performing desk research and conducting interviews with twelve public transport authorities. During these interviews we spoke about threats and opportunities as well as feasibility, visions and knowledge gaps. Subsequently we spoke about what the future of public transport would look like and how we can anticipate on these upcoming technologies. Lastly we asked about (future) pilot locations with automated vehicles. These locations are included on a map of the Netherlands.
In many places in the Netherlands there is or has already been experiments with automated vehicles (3 – 4). These pilots, experiments or demonstrations are often focused on the technical aspects. However, the challenges regarding the deployment of an automated vehicle extends beyond the technical level. The interviewed parties indicate that it is important to focus, with the upcoming pilots, more on the traveler and the position of the vehicle within the existing public transport network. The interviewed parties stress that it is important to think about the long-term implementation.
The current public transport contracts as we know them, will likely change with the arrival of automated vehicles. Concessions are already becoming more flexible and space is created to experiment with new concepts such as automated vehicles. During a concession, it is possible to experiment alongside the established service and a transition path can be mapped out. Tendering an automated shuttle has not (yet) taken place in the Netherlands (5). The public transport authorities are clear about the future: automated vehicles in public transport do not come with a ‘big bang’ but will gradually find their way.
Check the ETC presentation of Reanne Boersma, Arthur Scheltes and Niels van Oort HERE
Smart PT Lab @ European Transport Conference in Dublin
The Smart Public Transport Lab will be present at the European Transport Conference that will take place from 9th-11th October in Dublin, Ireland. Smart PT Lab members and partners will present the following studies:
• Impact assessment of new North/South metro line in Amsterdam
• AV meets PT: the future of automated vehicles in public transport
• Determinants of public transport use toward intermodal hubs, including emerging modes
• Equity-related impacts of coarser and high frequent public transport networks
• Bicycle and transit: a powerful combination
• Operations of E-buses: a challenging trade-off in finding optimal charging locations
• Controlling high-frequency bus services by implementing headway-based holding strategies
With, amongst others, Fatemeh Torabi Kachousangi, Roy van Kuijk, Reanne Boersma, Ties Brands, Malvika Dixit and Niels van Oort.
You may find the sessions by browsing the conference program at ETC program
Let us know if you are interested in more information in any of these studies. Looking forward to meet you at ETC2019!
Impacts of replacing a fixed transit line by a Demand Responsive Transit system
The diffusion of the smartphone and the urban sprawl is pushing both private and public actors to revisit the concept of the demand-responsive transit (DRT). Mokumflex is a DRT pilot program that replaced the regular bus service in low-density areas of Amsterdam, the Netherlands, for 12 months. The close collaboration with the private enterprise that conducted the system but also with the local bus operator allowed the authors to have access to precise databases, giving this article empirical information for both the situation before and after the implementation. These insights help to understand DRT systems and support (future) design of DRT and transit systems. A few indicators were chosen for the comparison: distances, ridership, costs, Greenhouse Gases (GHG), emissions and population’s perception. The ridership dropped, however, for being “demand-tailored”, the mileage per passenger reduced, improving the costs and GHG emissions. In regards to population’s perception, the system enjoyed a good evaluation.
Find the Thredbo presentation of Felipe Coutinho HERE and the paper HERE
The advantages of multi-modal concessions, two analyses in the Netherlands
Public transport authorities are aiming for more integrated concessions, including bus, train services, to provide a better experience for travellers. This paper describes the analysis of the effect of multimodal concessions.First, the Dutch Province of Limburg moved from uni-modal to a multimodal concession. The paper analyses effects of that choice had for network design, travel times (using weighted generalized travel time), travel costs, patronage (using smart card data analysis), and coordinative interactions between operator and authority (based on interviews). Second, the paper analyses three different forms of coordination between bus and train services, using the STO model. It compares three regional concession in the Netherlands in Limburg, Fryslân, and Groningen. They represent one region with a multi-modal concession under net-cost, one region with multiple unimodal concessions under net-cost and one region with multiple unimodal concessions under mixed forms of contract. The paper concludes that multi-modal concessions provide some real-world advantages to travellers and authorities. However, to what extent these advantages materialize is dependent on a number of key factors, including the type of contracts used, the number of transport authorities active in the concession area and the role that the transport authority wants to take up.
Find the Thredbo presentation of Gerald Hoekstra HERE and the paper HERE
Willingness to share rides in on-demand services for different market segments
The impact of on-demand urban transport services on traffic reduction will depend on the willingness to share (WTS) of individuals. However, the extent to which individuals are willing to share remains largely unknown. By means of a stated preference experiment, this study analyses the WTS of respondents by comparing their preferences towards individual and pooled rides. Urban Dutch individuals are the target population of this study. In our research, we: 1) quantify the WTS in on-demand services with different number of passengers to disentangle the sharing aspect from related time-cost considerations (e.g. detours); 2) investigate which distinct (latent) market segments exist in regards to the WTS and value of time (VOT) for these on-demand services, and 3) analyse which socioeconomic characteristics and travel patterns can help explain taste variations. Despite the large majority of current on-demand rides being individual, we found that less than one third of respondents have strong preferences for not sharing their rides. Also, we found
heterogeneity not only in the values of the WTS of individuals, but also in the way this disutility is perceived (per-ride or proportional to the in-vehicle time).
Find the Thredbo presentation of Maria Alonso-Gonzalez HERE
Impact analysis of a new metro line in Amsterdam using automated data sources
A new metro line (the north-south line) was opened in Amsterdam in July 2018, adding significant capacity to the existing urban public transport network consisting of bus, tram and metro modes. The opening of the metro line was accompanied by changes to the existing bus and tram network, such as removal of duplicate routes and addition of feeder routes.
Traditionally, the impact of such a network change was measured either ex-ante or post-op based on surveys or model forecasts (Vuk 2005; Knowles 1996; Engebretsen, Christiansen, and Strand 2017). However, with the availability of automated data sources such as the smart card data, the exact impact on transit demand and service quality can now be measured. However, so far this has been limited to analysing the changes in travel times and reliability at a trip level (Fu and Gu 2018), excluding transfers.
This research utilises smart card and AVL data to study the impact of the new line on travel patterns (passenger flows), travel times and reliability from a passenger perspective by considering journeys including transfers. The metrics are calculated at a stop-cluster level, enabling also a distributional analysis of the impacts. Such a post-op analysis of any policy intervention or network change could be used to refine the demand predictive ex-ante tools.
Check the Transit Data workshop contributions of Malvika Dixit: Presentation and Extended abstract
Forecasting bus ridership with trip planner usage data: a machine learning application
Currently, public transport gives much attention to environmental impact, costs and traveler satisfaction. Good short-term demand forecasting models can help improve these performance indicators. It can help prevent denied boarding and overcrowding in busses by detecting insufficient capacity beforehand. It could be used to operate more economically by decreasing the frequency or the size of the bus if there is overcapacity. Moreover, it could help operators plan their busses during incidental occasions like big public events where little information is known. Finally, it could be used to reliably inform the travelers on the current crowdedness.
This study investigates the usefulness of a new data source; the usage data of a trip planner. In the Netherlands there are multiple trip planners available for users to help find the most optimal (multimodal) journeys. These trip planners require a date, a time and an origin and destination, which they use to construct multiple alternative journeys from which the user can choose. For this study the data of 9292 was used, being the major trip planner in the Netherlands including all public transport modes.
We developed a model for forecasting the number of people boarding and a model for forecasting the number of people alighting at a certain stop. These forecasts are defined at the vehicle-stop level. By summing the number of people boarding and subtracting the number of people alighting along the trip the forecasted number of passengers after a stop is calculated.
We compare five different machine learning models: multiple linear regression, decision tree, random forests, neural networks and support vector regression with a radial basis kernel. We compare these models with two simple rules: 1 predict the same number as last week, and 2 predict the historic average as number. The models are implemented in the Scikit-Learn library of Python. The data is stored in a PostgresSQL database.
The trip planner datasets and smart card dataset are merged and preprocessed. The resulted dataset is rather sparse; a lot of stops have zero passengers boarding or alighting or requests suggesting to do so. Therefore we investigated if subsampling is needed. From the datasets useful data is selected and features are constructed. The features are standardized. Different number of features are tested, these features are selected based on recursive elimination using a simple random forests model. Finally, the hyperparameters of the models are tuned and the optimal configurations are stored. The scores are validated by using cross validation.
Find more details in the following contributions by Jop van Roosmalen: Transit Data workshop presentation and MSc thesis
When science meets practice: fiets+OV
Samen met de TU Delft organiseert Railforum regelmatig een ‘When science meets practice’. Tijdens deze bijeenkomsten wisselen studenten, wetenschappers en professionals uit de sector op een bepaald thema hun kennis en ervaringen uit. Hiermee willen we elkaar inspireren met nieuwe inzichten en betere oplossingen voor de praktijk, naast input voor een gezamenlijke onderzoeksagenda.
Op 3 april stond de combinatie van fiets en ov op het programma. Olaf Jonkeren van het Kennisinstituut voor Mobiliteitsbeleid presenteerde het onderzoek van het KiM i.s.m. Studio Bereikbaar over gecombineerd fiets-treingebruik in Nederland. Dorine Duives en Niels van Oort van de Delftse “Active Modes” en “Smart Public Transport” labs deelden hun inzichten over de gebruikers en de relatie van (deel)fietsen met bus, tram en metro.
De centrale vraag van deze middag was: Welke kennis en begrip hebben we over de keuzes die fiets-treinreizigers maken en hoe kunnen we hen beter faciliteren dan enkel door het bijbouwen van fietsenstallingen? Bij stations gaat bijna 50% van de stallingscapaciteit op aan 2e fietsen die niet dagelijks gebruikt worden.
Genoemde opties zijn het bevorderen van deelfietsen, het anders beprijzen van fietsenstallingen dichtbij het station om lang parkeren tegen te gaan. Belangrijkste conclusie was dat er nog veel marktpotentie is en we vooral de positieve kanten van ov en fiets beter kunnen communiceren, zoals dat bewegen goed is voor onze gezondheid!
De presentaties vind je HIER
Combining Speed Adjustment and Holding Control for Regularity based Transit Operations
Vehicle bunching often occurs in high-frequency transit systems leading to deterioration of service reliability. It is thus necessary to control vehicles during operations. Holding control is a common solution for this situation, but it may result in longer vehicle running times. Speed adjustments can contribute to more regular operations while preventing prolonged trip times. This paper proposes a control strategy, which combines these two strategies to maintain the regularity of transit operations. The findings based on simulation study for trunk bus services in the Netherlands suggest that combining the two strategies implies both the positive and negative attributes of each control.
Find the MT-ITS presentation and paper of Aishah Imram HERE and HERE
Walking and bicycle catchment areas of tram stops: factors and insights
Pollution and congestion are important issues in urban mobility. These can potentially be solved by multimodal transport, such as the bicycle-transit combination, which
benefits from the flexible aspect of the bicycle and the wider spatial range of public transport. In addition, the bicycle can increase the catchment areas of public transport stops. Most transit operators consider a fixed 400m buffer catchment area. Currently, not much is known about what influences the size of catchment areas, especially for the bicycle as a feeder mode.
Bicycles allow for reaching a further stop in order to avoid a transfer, but it is not clear whether travelers actually do this.This paper aims to fill this knowledge gap by assessing which factors affect feeder distance and feeder mode choice. Data are collected by an on-board transit revealed preference survey among tram travelers in The Hague, The Netherlands. Both regression models and a qualitative analysis are performed to identify the factors that influence feeder distance and feeder mode choice. Results show that the median walking feeder distance is 380m, and the median cycling feeder distance is 1025m. The tram stop density and chosen feeder mode are most important in feeder distance. For feeder mode choice, the following factors are found to be influential: tram stop density, availability of a bicycle, and frequency of cycling of the tram passenger. Furthermore, the motives of respondents for choosing a stop further away are mostly related to the quality of the transit service and comfort matters, of which avoiding a transfer is named most often. In contrast, the motives for cycling relate mostly to travel time reduction and the built environment. Three important barriers for the bicycle-tram combination have been discovered: unavailability of a bicycle, insufficient and unsafe bicycle parking places. Infrequent users of the bicycle-tram combination are more inclined to travel further to a stop that suits them better.
Find the MT-ITS paper and presentation of Lotte Rijsman HERE and HERE