Designing maps with fictional and real road intersections for the evaluation of countdown timer displays for bicyclists

Keler, Andreas; Grigoropoulos, Georgios; Kaths, Heather; Kramer, K.D.; Kaths, Jakob; Spangler, Matthias; Busch, Fritz

doi:10.5194/ica-proc-2-60-2019

Cited by 3 publications

(5 citation statements)

References 6 publications

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“…One part of our approach is based on the usage of a physical bicycle simulator allowing test subjects to interact with a simulated virtual environment, which is usually based on available geodata of selected locations. Due to frequent exchange with international research facilities and TESIS GmbH, which is part of Vector Informatik GmbH, and the evaluations by test subjects of previous studies [5], we successively improve the immersion and handling of the current bicycle simulator. A specific feature of the system is a functioning interface to the open traffic flow simulation tool SUMO, allowing test subjects to interact with simulated road users.…”

Section: Methodological Approachmentioning

confidence: 99%

“…With these collections, it is possible to design scenarios for bicycle simulator studies [2]. These scenarios can depict infrastructural design elements of the real world or fictional (via VR visualization) [5]. After validating the output data from the simulator studies, which are in most cases test-subject trajectories enriched with behavioral information (as gestures and head movements), we extend the maneuver catalogs.…”

Section: Methodological Approachmentioning

confidence: 99%

“…Besides focusing on road user interaction, there are bicycle simulator studies designed for evaluating novel bicycle infrastructure such as bicycle highways [2] or the perception of countdown timer displays [5].…”

Section: Bicycle Simulator Studies and Interactions At Roundaboutsmentioning

confidence: 99%

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Data-Driven Scenario Specification for AV–VRU Interactions at Urban Roundabouts

et al. 2021

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Detailed specifications of urban traffic from different perspectives and scales are crucial for understanding and predicting traffic situations from the view of an autonomous vehicle (AV). We suggest a data-driven specification scheme for maneuvers at different design elements of the built infrastructure and focus on urban roundabouts in Germany. Based on real observations, we define classes of maneuvers, interactions and driving strategies for cyclists, pedestrians and motorized vehicles and define a matrix for merging different maneuvers, resulting in more complex interactions. The sequences of these interactions, which partially consist of explicit communications, are extracted from real observations and adapted into microscopic traffic flow simulations. The simulated maneuver sequences are then visualized in 3D environments and experienced by bicycle simulator test subjects. Using trajectory segments (in fictional space) from two conducted simulator studies, we relate the recorded movement patterns of test subjects with observed cyclists in reality.

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Section: Methodological Approachmentioning

confidence: 99%

Section: Methodological Approachmentioning

confidence: 99%

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Data-Driven Scenario Specification for AV–VRU Interactions at Urban Roundabouts

et al. 2021

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“…In the study, participants rode along a simulated segment of Leopold/Ludwigstraße in Munich, Germany four times each. The width of the bicycle lane and the signal control strategy was varied between each of the runs [24].…”

Section: Datamentioning

confidence: 99%

Calibrating the Wiedemann 99 Car-Following Model for Bicycle Traffic

2021

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Car-following models are used in microscopic simulation tools to calculate the longitudinal acceleration of a vehicle based on the speed and position of a leading vehicle in the same lane. Bicycle traffic is usually included in microscopic traffic simulations by adjusting and calibrating behavior models developed for motor vehicle traffic. However, very little work has been carried out to examine the following behavior of bicyclists, calibrate following models to fit this observed behavior, and determine the validity of these calibrated models. In this paper, microscopic trajectory data collected in a bicycle simulator study are used to estimate the following parameters of the psycho-physical Wiedemann 99 car-following model implemented in PTV Vissim. The Wiedemann 99 model is selected due to the larger number of assessable parameters and the greater possibility to calibrate the model to fit observed behavior. The calibrated model is validated using the indicator average queue dissipation time at a traffic light on the facilities ranging in width between 1.5 m to 2.5 m. Results show that the parameter set derived from the microscopic trajectory data creates more realistic simulated bicycle traffic than a suggested parameter set. However, it was not possible to achieve the large variation in average queue dissipation times that was observed in the field with either of the tested parameter sets.

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“…The DYNA4 approach is addressed in Keler et al (2018), Keler et al (2019aKeler et al ( , 2019b and in Malcolm (2019). Similar to the workflow in Figure 3, most map designs rely on real investigation areas or extracts of these from OSM (Keler et al 2021).…”

Section: The Dyna4 Approachmentioning

confidence: 99%

Designing Maps for Bicycling Simulator Studies – three practical Approaches

Keler

Malcolm

Grigoropoulos

et al. 2021

Proc. Int. Cartogr. Assoc.

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Abstract. Bicycle simulator studies result from attempts of solving various novel problem statements of modern transportation-related research questions. Examples imply the evaluation of novel traffic control strategies for prioritizing urban bicycle traffic, novel bicycle infrastructure (such as bicycle highways) and the interaction and communication of vulnerable road users with automated or autonomous vehicles. As one of classical disciplines of transportation research, namely traffic engineering, and less related to human factors research, automotive research, geography, urban planning or citizen science, we want to point out those bicycle simulator studies design approaches, which are more related to testing novel traffic control strategies for cyclists, experiencing changing traffic-efficiency and –safety-related parameters in ongoing interfaced microscopic traffic flow simulations. We believe that this is a key factor in experiencing various traffic situations and the evaluation of thereof. In this research, we introduce three practical approaches of how to design maps for bicycling simulator studies. This is mainly resulting from manifold practical experiences from already conducted simulator studies beginning from the year 2018.

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Designing maps with fictional and real road intersections for the evaluation of countdown timer displays for bicyclists

Cited by 3 publications

References 6 publications

Data-Driven Scenario Specification for AV–VRU Interactions at Urban Roundabouts

Data-Driven Scenario Specification for AV–VRU Interactions at Urban Roundabouts

Calibrating the Wiedemann 99 Car-Following Model for Bicycle Traffic

Designing Maps for Bicycling Simulator Studies – three practical Approaches

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