A Novel Real-time Visualization Algorithm for Computing Three-dimensional Sight Distance
Yang Ma, Southeast UniversityShow Abstract
Yubing Zheng, Southeast University
Jianchuan Cheng, Southeast University
Yunlong Zhang, Texas A&M University
Lixin Guo, Southeast University
A few models have been developed for computing the three-dimensional available sight distance (3D ASD), but nearly all of these existing models/algorithms have simplifications to the road environment, especially to the roadside obstructions. In this paper, a real-time visualization algorithm was proposed for determining the available 3D sight distance. The road environment was represented by the dense and organized 3D points along the spatial alignment while the crown slopes, superelevation, widening, etc. were all considered for the roadway and almost no simplification was made to the roadside obstacles. The driver’s dynamic vision along the highway was simulated and digitized with the sequential application of 3D coordinate transformation and perspective projection. A new concave hull algorithm was proposed to facilitate the process of searching for the sight obstacles. The result of the 3D sight distance and the instantaneous vision of the driver at a given position were outputted simultaneously. The new algorithm makes it possible to identify obstacles obstructing the line of sight, ensure the correctness of the sight distance, and provide basis for real-time safety applications. The algorithm can also be applied to undertake geometric consistency audits, road safety audits, and to determine passing or no-passing zones on two-lane highways. A case study was also presented to demonstrate the validity and superiority of the proposed algorithm over 2D models and other 3D models.
Mobility is a serious game : a game to explore the future of mobility
Cathy Macharis, Vrije Universiteit BrusselShow Abstract
Our society is changing rapidly and its mobility system does not keep pace. We are still driving around in diesel cars, not internalising external costs, not using multimodality in its full potential, etc. Although there is more and more consensus that we should go for a more sustainable mobility system, it does not seem to be easy to implement it and to create a common vision of the future. Thinking about that future is also not that easy. For this reason we created the board game « Mobility is a serious game ». It enables to explore the future of mobility in three time horizons: near future (1 to 5 years), medium (5-10 years) and long (up to 30 years). It is an interactive setting where the players can put themselves into the roles of either a government (local or higher), a business (up to two players), an NGO (also maximum two players) and the public voice. This public voice has an important role as he/she will comment on the actions of the others players and so reward their actions with coins. The game has been tried out several times before launching it on a large event. The game enables to connect people, show empathy for each other's role and let new and collaborative ideas surface.
Visualization Design of Transportation Education Games
Qichao Wang, Virginia Polytechnic Institute and State UniversityShow Abstract
Montasir Abbas, Virginia Polytechnic Institute and State University
Transportation researchers need to break the barriers of transportation area to foster the collaboration with researchers in other fields; transportation engineers need tools to communicate to the public effectively to make the change happens. Educational games about transportation engineering can illustrate the transportation concepts in an interactive and visual way to convey the knowledge in an engaging manner. There are games being developed by researchers to show transportation phenomenon. Visualization is one of the most important elements in an educational video game. However, there are no guidelines on how to design the visualization for the transportation education games. We have been actively developing video games for transportation engineering education. This paper presents how we designed the visualization during the developments and revisions of the games. This paper can be used as a guide for using the games we developed to communicate to the people outside of transportation area. It can also be used to guide developers to build new games for a specific transportation problem.
A Framework for Interactive M3 Visualization of Microscopic Traffic Simulation
Hong Yang, Old Dominion UniversityShow Abstract
Yuzhong Shen, Old Dominion University
Mahmud Hasan, Old Dominion University
Daniel Perez, Old Dominion University
John Shull, Old Dominion University
Full comprehension of microscopic traffic simulation (MTS) models has necessitated the development of proper visualizations. Existing MTS models only provide limited capability of two- and/or three-dimensional displays that always restrict users’ viewpoint to a flat screen. Their downscaled scenes neither provide a realistic representation of the environment nor allow different users to simultaneously experience the simulation model from different perspectives. This largely prevent analysts from effectively demonstrating and disseminating their simulation results to various stakeholders of different background and knowledge. In light of these issues, this paper aims to develop a framework that enables multi-user, multi-perspective, and multi-mode (M3) visualization architecture for microscopic traffic simulation. The proposed framework is empowered by the latest advances in cloud computing and virtual reality to support interactive and immersive visualization for simulated traffic environments. A client-server architecture allows multiple users at distributed physical locations to view the same simulation from multiple perspectives simultaneously and supports a variety of virtual/augmented reality devices. A prototype of the proposed M 3 visualization framework is implemented and demonstrated by simulating and visualizing a model of typical traffic operation in a high-density urban area. The promising capability of the M3 visualization framework is attested. Potential improvements over the present study to further excel current visualization framework are also discussed.
Simulation Games to Study Transportation Issues and Solutions: Studies on synchromodality
Ioanna Kourounioti, Delft University of TechnologyShow Abstract
Shalini Kurapati, Delft University of Technology
Heide Lukosch, Delft University of Technology
Lorant Tavasszy, Delft University of Technology
Alexander Verbraeck, Delft University of Technology
In this paper we discuss the application of simulation gaming to study the behavior and decision making of stakeholders when confronted with complex transportation problems. The problem we tackle is synchromodal transportation. Synchromodality requires the vertical and horizontal collaboration of stakeholders in all the levels of decision making. To facilitate this we develop four games designed in a way that meets the needs of decision makers in each level. We present both board and digital games and the results from the first gaming sessions with Dutch supply chain and logistics professionals.
The Effect of Incentives to Promote Cycling: A Mobility Living Lab
Bingyuan Huang, University of TwenteShow Abstract
Tom Thomas, University of Twente
Benjamin Groenewolt, Keypoint Consultancy
Tiago Fioreze, University of Twente
As part of the Horizon 2020 project EMPOWER, this paper presents results from a case study on the impact of positive incentives on cycling behavior for around 70 participants in the Twente region of the Netherlands. This was done by using the SMART app in a real-world living lab environment. The SMART app uses challenges with rewards, feedback, and message functions to promote cycling. In this particular case, participants were challenged to cycle at least 10 times along a newly paved cycling road and get rewarded upon completion of the challenge. A post-challenge survey was sent through the app to evaluate participants’ behavior. We found that the campaign resulted in new bike trips, on the newly paved road, made by users who completed the challenge, even after the campaign had ended. According to the survey, 44% of participants responded that their behavior had changed due to the campaign, and that they would keep on cycling more often after the campaign. Most users who did not complete the challenge said they do not need to use this road, but 20% of them indicated that they would cycle more if they got challenges and rewards more suited to their personal situation. This implies that challenges are more effective when they are customized based on individuals’ historical travel patterns.