7. | Non-Exhaust Particles

Theodoros Grigoratos (JRC) presented the summary of the investigation which covered PM10 emission factors for non-exhaust particles.

Some discussion of an example of a damage cost scenario – after some discussion this was removed from the presentation as the scenario was theoretical only and was not not technically feasible to achieve.

Noted there is very little information on clutch wear, nearly nothing since 1990 when asbestos was removed, however, as most modern clutches are contained, there is probably no need to study this further.

REBRAKE study ongoing – objective : 50% reduction on brake emissions

M Gustaffson – VTI presented findings on interaction of tyre/road wear particles:

• Road dust = suspension and resuspension
• Considered different tyre types & different pavement types and used wet dust sampling
• Noted pavements in Sweden / Norway / Finland well adapted to run studded tyres w/o excessive PN emissions
• Slide 23 gives details of an expert working group on road dust.

Following discussion of what PMP should consider and where PMP could contribute to the work, it was agreed that brake and tyre / road wear measurement methods could be in scope for PMP but resuspended road dust out of scope because no vehicle regulation relevant.