If we take the average results of these emission inventories, we obtain PM10 emission factors of 6.1 mg/vkm, 9.3 mg/vkm, 7.5 mg/vkm and 40 mg/vkm for tyre wear, brake wear, road surface wearand resuspension of road dust, respectively. PM2.5 emissions are 2.9 mg/vkm, 2.2 mg/vkm, 3.1 mg/vkm and 12 mg/vkm for tyre wear, brake wear, road wear and resuspension, respectively. SeeTable 4. These results are in line with those found by the literature review of Grigoratos and Martini (2014).