Search results for "VISSIM"
showing 7 items of 7 documents
Surrogate Measures of Safety at Roundabouts in AIMSUN and VISSIM Environment
2018
This paper addresses issues on road safety analysis through microscopic traffic simulation models. The Surrogate Safety Assessment Model (SSAM) was applied to read vehicle trajectory files generated by two micro-simulators and then calculate surrogate measures of safety. Since safety assessment of any road entity can provide different results based on the micro-simulator which is used, the main objective of this research was to estimate the safety performance of three roundabout layouts and compare the conflict events simulated by AIMSUN and VISSIM. The two micro-simulators were used to build the calibrated models of the roundabouts, each fitting the corresponding empirical capacity functio…
Evaluation of Roundabout Safety Performance through Surrogate Safety Measures from Microsimulation
2018
The paper presents a microsimulation-based approach for roundabout safety performance evaluation. Based on a sample of Slovenian roundabouts, the vehicle trajectories exported from AIMSUN and VISSIM were used to estimate traffic conflicts using the Surrogate Safety Assessment Model (SSAM). AIMSUN and VISSIM were calibrated for single-lane, double-lane and turbo roundabouts using the corresponding empirical capacity function which included critical and follow-up headways estimated through meta-analysis. Based on calibration of the microsimulation models, a crash prediction model from simulated peak hour conflicts for a sample of Slovenian roundabouts was developed. A generalized linear model…
Modelli di simulazione pedonale in ambito aeroportuale
2018
I terminal aeroportuali rappresentano nodi complessi d’interscambio tra diffe-renti modi di trasporto ed il loro corretto dimensionamento può influire sull’operativi-tà del sistema di trasporto al quale sono connessi, specie se caratterizzato dai vo-lumi di crescita che si registrano su moltissimi aeroporti nazionali ed internazionali.
The liability of the shipmaster in early modern law: comparative (and practice-oriented) remarks
2017
This article deals with the liability of the shipmaster in early modern law in civil and common law, focusing on the approach of Italian and (to a lesser extent) also Iberian courts on the one hand, and on that of common law courts (mostly the King's Bench) on the other. The practice-oriented approach is deliberate: the article seeks to understand what the actual position of the carrier was, not how did learned jurists classify it. Once distinguished practice from dogmatic elaborations (especially for the civil law), this work then proceeds to compare the rules applicable in the two different legal systems. Common law courts imposed strict liability on the shipmaster, for it qualified the c…
Caso fortuito e culpa levissima: premesse ad uno studio sul nesso di causalità nel pensiero giuridico tardo medievale
2022
Lo studio esamina lo sviluppo del nesso causale nel diritto comune tardo medievale
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 …
Transporta plūsmu organizācijas scenāriju izstrāde: Rīgas centra teritorijas piemērs
2017
Satiksmes intensitātes palielināšanās, kas, nemainot infrastruktūru, rada sastrēgumus, palielina pārvadājumu izmaksu celšanos un piegādes termiņus, uzskatāma par vienu no aktuālākajām problēmām pēdējo gadu laikā pilsētās un to apkaimju teritorijās. Darba ietvaros izstrādāti noslogotāko Rīgas centra krustojumu matemātiskie modeļi, to kalibrēšana veikta, izmantojot aktuālos transporta plūsmu novērojumus un luksoforu regulācijas režīmus (saskaņā ar Rīgas Domes Satiksmes departamenta datiem). Modelēšanas ceļā, izmantojot specializētu programmu VISSIM, analizēti transporta plūsmu režīmi dažādas noslodzes situācijās, piedāvāti plūsmu organizācijas uzlabojumi, lai mazinātu sastrēgumus.