The Port Logistic Support Areas (PLSA) receive and carry out the sorting of trucks that have the aim to reach the maritime terminals of the Port of Santos. Such areas are vital for the logistics of grains exporting as they regulate the flow of these vehicles, avoiding logistic bottlenecks and maintaining an appropriate balance within the city. This research aims at analyzing the prospects of PLSA in the face of new credentials carried out by the different Port Authorities in several parts of Brazil since there is a fall down in the trade of these companies. An exploratory method was used to analyze the truck movement data during the years of 2015, 2016, and 2017. It was considered the in-flow of grain carrying trucks facing the out-going from São Paulo city to the port of Santos. A reduction of more than 30% in vehicle movement was verified, from Jan 2015 to Dec 2017, where some determining factors were responsible for this reduction, as the use of other ports to the outflow of harvesters and the use of the rail modal, which leads to the questioning of the real need for the accreditation of new PLSAs.