Search results for " Ferrovie Ed Aeroporti"
showing 10 items of 380 documents
TRATTAMENTO CON CALCE DEI TERRENI ARGILLOSI: STATO ATTUALE DELLA TECNICA
2011
Preliminary Evaluation of Plasmix Compound from Plastics Packaging Waste for Reuse in Bituminous Pavements
2021
Finding an appropriate technical solution for reusing waste plastics is crucial for creating a circular plastic economy. Although mechanical recycling is the best option for recycling post-consumer plastics, some heterogeneous mixed plastics cannot be recycled to produce secondary material due to their very low properties. In this case, alternative routes should be considered in order to limit their disposal as much as possible. Therefore, in order to solve the environmental problems in the landfills of plastic waste recycling, and to improve the mechanical performance of bitumen for road pavement, the reuse of these post-consumer plastic wastes are preliminarily evaluated for the modificat…
Quality-control procedure for dry-process rubberised asphalt mastics
2019
Crumb Rubber (CR) can be incorporated into asphalt mixes via the dry process by directly adding CR into the mixer together with other asphalt mixture’s components, or with the wet process where the CR is used as a bitumen modifier. While the wet process allows an accurate monitoring of the interaction between CR and bitumen, the lack of control represents a main issue in the dry process. In fact, in the latter the CR particles keep swelling during hauling and possibly also after paving operations, often causing workability issues and premature failures. This study wants to provide a methodology that could help quality control procedures of bitumen/filler/rubber systems during mixing, haulin…
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”…
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.