Wyniki wyszukiwania - BazTech

1

Simulation of a vehicular traffic system based on queueing network models: comparative analysis of two models

Pasini Leonardo, Del Giudice Nicola

TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk

|

2020

|

Vol. 24, No 3

243--292

EN

In the previous works we presented a study for modeling and simulation of vehicular traffic systems based on queuing networks. Specifically, in paper (Pasini and Bianchini, 2019), we studied the urban network located in North Siena, in the city of Siena (Italy), in its actual layout, after the Municipality had introduced some changes for vehicular flow management. This system is based on two roundabouts and a crossroad, as shown in Figure 1. In this work, we are going to conclude our previous study, comparing the actual vehicular flow and the flow derived from an alternative system, foreseen by the PRG of the Municipality of Siena which is composed of three roundabouts and which has not been implemented yet.

2

Simulation of a vehicular traffic system based on queuing network models

Pasini Leonardo, Bianchini Lorenzo

TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk

|

2019

|

Vol. 23, No 1

101--135

EN

This work is part of the research activities developed in our department on the construction of vehicle traffic system simulators (TASKQuart.22(2) 135 [1],20(1) 9 [2],17(3) 155 [3],20(3) 273 [5],14(4) 405 [6],9(4) 397 [7],Simulation Modelling Practice and Theory 17 (4) 625 [8]). The modeling of the traffic system is implemented through the use of queuing networks. In this case we analyze, through a simulation, the impact on traffic flows of a structural change that the Municipal Administration has implemented on the urban road system. The study refers to some works published by us previously about the procedures applied by us to build a simulator. In this case we have developed software allowing us to analyze the data tracked by the system simulations to display it graphically. This procedure enables us to clearly compare the traffic system behavior in its new configuration with the traffic system behavior in the previous configuration.

3

Queuing Networks to Evaluate Web Applications: Simulation

Pasini Leonardo, Barboni Morena

TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk

|

2019

|

Vol. 23, No 3

319--355

EN

This work fits into the context of our studies on traffic simulation for computer and telecommunication networks [1–5]. The technique that we use is based on complex queuing network models that allow us to simulate the functioning of network devices, and the traffic flows between them. In a previous work [2] we defined a library of objects for the modeling of the computer network. This library also models the network traffic induced by the execution of web applications run in a distributed fashion on various network devices. In this work we describe the changes applied to the service procedures of some library objects, and we develop a specific study for the evaluation of the execution times of three types of applications: 1. Navigation 2. Download Manager 3. Mobile Agents.

4

Evaluation of the impact of changes in the city road system on traffic flows

Pasini Leonardo

TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk

|

2018

|

Vol. 22. No 2

135--171

EN

This paper outlines a study carried out to answer the questions asked by an architect of the Siena Municipality Office during a conference at our Department on the managementof traffic flows through the Siena North city road system. The purpose of the study was to ascertain if changes in the road system introduced and included in the new City Developmen tPlan would resolve the current traffic congestion issues. In order to answer this question, we used the technology for the development of vehicle traffic system simulators which was introduced during our previous projects (TASKQuart.14(4) 405,17(3) 155,20(1) 9,20(3) 273).