“…Detailed accounts of sources and properties of non-exhaust emissions and ambient measurements of non-exhaust components are provided elsewhere (Luhana et al, 2004;Thorpe and Harrison, 2008;Pant and Harrison, 2013;Amato et al, 2014). Typical methods for characterization of RD and non-exhaust emissions include use of a brake dynamometer (Garg et al, 2000), rolling resistance testing machine (Rogge et al, 1993), rotating drum method (Camatani et al, 2001), sweep/vacuum collection of particles followed by sieving or resuspension (Duong and Lee, 2011;Martuzevicius et al, 2011) and use of a specific RD sampler (Amato et al, 2009). Several researchers have analysed the chemical composition of brake components (Rogge et al, 1993;Garg et al, 2000;Kukutschova et al, 2010Kukutschova et al, , 2011Hulskotte et al, 2014) and tyres (Camatani et al, 2001;Adachi and Tainosho, 2004;Councell et al, 2004;Milani et al, 2004;Aatmeeyata and Sharma, 2010).…”