Laura Bieker

Traffic Simulation for All: A Real World Traffic Scenario from the City of Bologna

A large effort is needed to gather, convert and adapt all the data needed to replicate a part of a real road network. To allow performing real-world evaluations using SUMO out-of-the-box, three “real-world” traffic simulation scenarios that represent parts of the city of Bologna are made available to the public. With these scenarios, researchers are able to start their investigations with little preparation effort and can concentrate on their research questions. This article describes, evaluates, and discusses the scenarios.

Modeling and simulating ITS applications with iTETRIS

This work presents the modeling methodology of the iTETRIS platform to integrate and simulate ITS applications. iTETRIS is a modular and open-source simulation platform composed of four key modules: the network simulator ns-3, the traffic simulator SUMO, an ITS (Intelligent Transportation System) application simulator, and a central federating module called iCS. Our contribution is twofold: First, we propose a methodology to model and simulate ITS applications with iTETRIS around three main mechanisms: (i) message management with generic open APIs based on subscription/result container mechanisms (ii) data management with the integration of an application facilities layer in the iCS, including a local dynamic map (LDM), (iii) application management with an ITS application simulator including one or more application logics. Second, we apply this methodology to implement the following four ITS applications: dynamic route planning, bus lane management, emergency vehicle, and contextual speed adaptation. We describe their integrations in iTETRIS, including a characterization of their interactions with the iCS, and illustrate the benefits of these ITS applications on traffic efficiency, gasoline consumption, or air pollutant emissions.

Evaluation of opening bus lanes for private traffic triggered via V2X communication

Within the EC project “iTETRIS”, an architecture for simulating traffic management applications based on vehicular communications (V2X) was designed and implemented. The work was based on evaluating the needs of a real city - the city of Bologna. Applications which try to solve the detected problems were defined and evaluated in subsequent steps. This report describes the evaluation of one of the developed applications, namely “Bus Lane Management”. It was analyzed whether it is possible to detect the traffic demand via V2X communication and open bus lanes for private vehicles. It turned out that this could be done efficiently: dedicating the free space on the bus lanes improves the average travel times and route lengths of all vehicles. However, this is true only if the penetration rates stay well below 50%. If more vehicles try to benefit, the situation deteriorates readily.

Modeling Mobility with Open Data

Introducing a new hobby for other people may inspire them to join with you. Reading, as one of mutual hobby, is considered as the very easy hobby to do. But, many people are not interested in this hobby. Why? Boring is the reason of why. However, this feel actually can deal with the book and time of you reading. Yeah, one that we will refer to break the boredom in reading is choosing modeling mobility with open data as the reading material.

How Does the Traffic Behavior Change by Using In-Vehicle Signage for Speed Limits in Urban Areas?

Speeding is a major risk factor for accidents. Reminding the driver of the current speed limit might improve traffic safety. The impact of In-Vehicle Signage (IVS) for speed limits via Car2Infrastructure communication was investigated in a test field in Tampere (Finland). The test field results show that IVS has a positive influence on the speed of the drivers of the equipped vehicle. Different scenarios for the estimated penetration rates of equipped vehicles were set up to see the overall effects on the traffic efficiency by IVS. The effects on the traffic efficiency were simulated in SUMO. The simulation results show that no benefit in traffic efficiency for all traffic participants could be reached by IVS.