Furthermore, and in contrast with the works using average values of relevant parameters, the influence of different transportation speeds and changing loading weight on the fuel consumption and amount of released pollutant emissions were taken into account. This is another important aspect of the present work approaching the obtained results to real-life situations. With such an optimization tool, for the studied case of the glass-waste collection and transportation of the Amarsul S.A. system in Barreiro, Portugal, it was possible to attain a considerable reduction in the operation costs (maintenance, labor and fuel) due to the reduction of the total collection time and fuel consumption and, consequently, reductions of the pollutant emissions (CO, CO2, NOx and PM).