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This paper analyzes the vehicular mobility in 3 specific points of the municipalities of Riohacha and Maicao, La Guajira Colombia. Variables of vehicular flow such as queue arrival times, density, permanence, infractions and other implicit ones were used. Observation and description processes are carried out over four continuous months in critical hours; the flow variables that affected the selected points, causes and effects were identified and described, which are represented using influence diagrams. The whole process was simulated, using high performance software such as PTV Vissim 8 and Vensim PLE. It is recognized that the vehicular mobility in the studied points, the congested genres due to the high frequency of vehicles that transit and that the current traffic regulations are something that don't help enough to improve the flow. In addition to infractions, accidents and situations of intolerance, toxicity is generated in the environment by the emission of CO2 by vehicles waiting at each critical point, matters to which authorities still do not pay attention. [ABSTRACT FROM AUTHOR]

The traditional approach to the study of human factors in the maritime work domain is the analysis of accidents. These analyses could provide valuable information, but they are not sufficient in the attempt to capture the causal relationship between performance shaping factors and human performance in the everyday routine work. Important parameters are safety, efficiency and comfort. Another and more suitable approach to the study of human factors everyday routine work in the maritime domain is the quasi-experimental field study where variations in performance (for example attention) can be observed as a function of natural variations in performance shaping factors (for example workload). The empirical study described in this paper is a study of two relevant human performances concept: workload and attention. We have demonstrated how these natural variations of workload can be very easily observed as a function of the different stages or phases of a voyage. We have also suggested a very easy method for the measurement of the crew attention through the measurement of communications at the bridge of the ship. Full mission Ship Handling Simulator was used for analyzing the human error, as part of the human error stage of the OPTIMPORT project. [ABSTRACT FROM AUTHOR]