Based on a case study of two different-sized Spanish cities, Comendador et al. propose a categorization of urban freight distribution for the vehicle category of less than 3.5 T (vans) [11]. The authors have made a survey combining three techniques: GPS-based data collection, a vehicle observation survey and complementary driver's interviews. The GPS survey was carried out on a sample of 20 vans followed during 2 months. A commercial device was used to collect the data. This device being fixed, it was needed to install it on the vans. The small size of the van sample is due to the costs of the commercial device. However, the advantages of using a commercial tool arise on the fact it is user-friendly (graphic interfaces), easy to install and produces calibrated routes without a need of data post-processing. However, the paper does not indicate the frequency of recorded data (if it is each second or a lower frequency) and how the data is stored and transferred. Moreover, drivers of this sample are asked to fill a personalized trip diary to provide qualitative information. Two main questions are asked, but drivers are not asked to detail their paths in order to double the GPS data (as for [6]). Finally, a vehicle counting action on a sample of 40000 vans was carried out in the two cities. The authors aggregate then the results of the three data collection procedures to make a characterization of urban vans’ paths.