Professor Macea studies the development of complex models based on operation research, statistics and econometric theory to understand and predict the behavior of users of transport systems, thus allowing its designing and management. He also uses optimization tools and numerical analysis to model transport networks attending to their flows requirements and constraints. Some of his main interests are focus on the economic aspects of transportation as government regulatory policies and the valuation of its negative external effects (congestion, accidents, air pollution, noise and spatial segregation). His current efforts are focused on developing humanitarian logistics models to perform risk analysis as well as to conduct economic evaluation of humanitarian aid operations. One of his most significant contributions to this research field was the design and coding of a vulnerability assessment model of transportation networks for the decision making in humanitarian logistics.