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Identifying reproducible macroscopic traffic patterns in a year-long data set
(2019)2019 TRB Annual Meeting OnlineThe macroscopic Fundamental Diagram (MFD) provides a novel perspective on urban traffic that facilitates new policies and strategies to cope with recurring congestion. The MFD is assumed to be well-defined and reproducible, but, so far, no long-term empirical evidence for this shape assumption exists. In this paper, the authors use an extensive one-year traffic data set from Lucerne, recent advances in modeling the MFD shape as well as ...Conference Paper -
Modeling multi-modal traffic in cities using the 3D Macroscopic Fundamental Diagram
(2019)2019 TRB Annual Meeting OnlineConference Paper -
Approximative network partitioning for MFDs from stationary sensor data
(2019)2019 TRB Annual Meeting OnlineConference Paper -
Modeling multi-modal traffic in cities
(2018)We propose a new functional form for the 3D-MFD. The 3D-MFD links the number of cars and buses in an urban network to the total travel production. The parameters of the functional form are derived from the structure and topology of the road and bus network. The physical interactions of vehicles are described by a single parameter. We apply the methodology to two empirical data sets from London and Zurich, and discuss policy relevant ...Conference Paper -
Approximative network partitioning for MFDs from stationary sensor data
(2018)Macroscopic fundamental diagrams (MFD) are typically estimated for sub-regions in cities, where the zoning conventionally follows the directive of homogeneity in the road network and traffic. Existing network partitioning algorithms fail to work for MFD estimation with stationary sensor data as their link speed and link density measurement are biased by the location of the sensor. However, in this paper, we present an approach for ...Conference Paper -
Evaluating London's congestion charge
(2018)The rationale of road-pricing schemes is to reduce the negative externalities of road traffic by increasing costs to decrease demand. Although in the transportation literature this is a well-acknowledged means of relieving cities from congestion, only few cities have introduced such schemes so far. One of the most notable examples in Europe is London’s congestion charge. Motorists entering London’s city center are required to pay a fixed ...Conference Paper -
A case study of Zurich’s two-layered perimeter control
(2018)This paper evaluates Zurich’s perimeter control with loop detector data from the entire city. We compare the speed indices and congestion levels within the controlled area and its surrounding areas using the concept of the macroscopic fundamental diagram (MFD). At times of heavy congestion, vehicles are prevented by two layers of control to enter the perimeter of the inner city. With the introduction of the concept of the MFD and the ...Conference Paper -
Introducing a re-sampling methodology for the estimation of empirical macroscopic fundamental diagrams
(2018)2018 TRB Annual Meeting OnlineConference Paper -
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Network features and MFD parameters
(2017)While there is a well-studied body of literature on the relationship between the built environment and travel behavior, the relationship between the built environment and the performance of urban road networks is less understood. Macroscopic traffic models, such as the macroscopic fundamental diagram (MFD), model the response of the transport system to travel demand. Many macroscopic models try to establish a functional relationship between ...Conference Paper