Search results for " Ferro"

Safety evaluation of turbo roundabout with and without internal traffic separations considering autonomous vehicles operation

The paper presents a microsimulation approach for assessing the safety performance of turbo-roundabouts where Cooperative Autonomous Vehicles “CAVs” have been mixed with conventional vehicles “CVs”. Based on the analysis of vehicle trajectories from VISSIM and subsequent analysis of traffic conflicts through the Surrogate Safety Assessment Model (SSAM), the research aims to evaluate the safety benefits of turbo-roundabouts where the lanes are physically separated by raised curbs compared to roundabouts without curbs. The paper shall also lead to describe the methodological path followed to build VISSIM models of turboroundabout with and without raised curbs, to calibrate the simulation mode…

Estimating traffic operations at multi-lane roundabouts: A case study

2014

This paper addresses traffic modeling issues at urban multi-lane roundabouts where, despite circulating vehicles have priority, negotiation of the right-of-way can occur between antagonist traffic flows, as a result of minor drivers’ failing to obey the nominal operating rule (stop or yield control). Existing models for the estimation of operational performances have the shortcoming of not representing the interdependencies between entering and circulating vehicles at multi-lane roundabouts. An analytical capacity model derived from field observations was developed for this kind of intersections in a previous study. The complexity of the model lies in the difficulty of observing the behavio…

LCA of Different Construction Choices for a Double-Track Railway Line for Sustainability Evaluations

2023

The international commitment to achieve carbon neutrality in the next few decades has oriented human activities towards the preservation of natural and non-renewable resources. In this context, a great research effort has been devoted to the search for sustainable solutions for the infrastructure construction sector, based on a thorough assessment of the environmental impact (EI). In this regards, Life Cycle Assessment (LCA) is considered one of the main components of Environmental Impact Assessment (EIA) and, for a comprehensive analysis, all the costs incurred by stakeholders during the useful life of the infrastructure should also be taken into account, applying the Life Cycle Cost (LCC)…

Safety Evaluation of Turbo-Roundabouts with and without Internal Traffic Separations Considering Autonomous Vehicles Operation

2021

The paper presents a microsimulation approach for assessing the safety performance of turbo-roundabouts where Cooperative Autonomous Vehicles “CAVs” have been introduced into the traffic mix alongside conventional vehicles “CVs”. Based on the analysis of vehicle trajectories from VISSIM and subsequent analysis of traffic conflicts through the Surrogate Safety Assessment Model (SSAM), the research aims to evaluate the safety benefits of turbo-roundabouts where the lanes are physically separated by raised curbs, compared to roundabouts without such curbs. The paper will then describe the methodological path followed to build VISSIM models of turbo-roundabouts with and without raised curbs in …

Modello di capacità e valutazione delle prestazioni per le rotatorie a turbina.

2008

L’evoluzione più recente delle intersezioni a rotatoria si è indirizzata verso schemi cosiddetti a turbina (turborotatorie) con l’obiettivo di garantire condizioni di sicurezza più elevate rispetto agli schemi tradizionali. I pochi esempi di realizzazione delle rotatorie a turbina non hanno tuttavia finora consentito di sviluppare metodi di analisi delle condizioni operative e modelli di capacità che possano vantare una validazione attraverso osservazioni di campo. In ogni caso, l’approccio teorico allo studio funzionale delle turborotatorie presenta aspetti decisamente più complessi di quelli delle rotatorie convenzionali sia a causa delle traiettorie dei flussi in ingresso (costretti ad i…

An international review on one and two level innovative unconventional intersection and interchange.

2013

The research on road intersection and interchange has recently allowed to design innovative one and two level unconventional layouts (UIIDs) which are of undoubted interest, especially in terms of traffic functionality and safety. The main objective of the paper is to discuss the geometric layouts, the principal advantages and the disadvantages, in terms of cost, safety, performances of the most interesting UIIDs, like two-level signalized intersection (TLSI), single-point urban interchanges (SPUI), center-turn overpass (CTO), echelon interchange (EI), Crossover Diamond interchanges (DCD), Upstream Signalized Crossover Intersection (USC), Median U-turn Intersection (MUT), “Target”, “Flower”…

La problematica del colore negli "smaltini di calcara" palermitani

2008

Green Aviation L’impatto ambientale nel settore aeroportuale

2009

Notiziario della Società Italiana di Infrastrutture Viarie incentrato sul workshop intitolato “GREEN AVIATION, Cosa possiamo fare?”, organizzato dal Dipartimento di Ingegneria dei Trasporti (DIT) dell’ Università degli Studi “Federico II” di Napoli lo scorso Aprile 2009.

L’emergenza del fenomeno urbano nell’Europa continentale della seconda età del Ferro: Bibracte e gli oppida celtici.

2020

Fin dagli inizi del ventesimo secolo, il processo di urbanizzazione nell’Europa transalpina della seconda età del Ferro è stato associato alla comparsa tardiva, alla fine del II secolo a.C., dei cosiddetti oppida, centri fortificati il cui carattere urbano è stato riconosciuto grazie agli scavi di siti di riferimento come l’oppidum di Bibracte, nell’attuale Borgogna. L’esponenziale aumento delle ricerche archeologiche su scala europea degli ultimi decenni, tuttavia, incita a riesaminare la questione alla luce di un fenomeno urbano più articolato di quanto ritenuto finora, che trova le sue radici già nel III secolo a.C. Depuis le début du xxe siècle, le processus d’urbanisation dans l’Europe…