1. Federal Department of the Environment, Transport, Energy and Communications DETEC Federal Office for the Environment FOEN Non-exhaust PM10 emission factors for road transport TFEIP/EIONET-Meeting, Transport Expert Panel Stockholm, 2nd May 2011 Division for Air Pollution Control and NIR

2. 2 Non-exhaust PM10 emission factors for road transport| TFEIP/EIONET Meeting Stockholm 2 nd May 2011, Transport Expert Panel Dr. Sophie Hoehn, Federal Office for the Environment FOEN, Division for air pollution control and NIR Overview Development of PM10-Emissions by Transport in Switzerland Examples of recent studies Results of Swiss APART-Study Comparison with Guidebook 2009 Conclusion

3. 3 Non-exhaust PM10 emission factors for road transport| TFEIP/EIONET Meeting Stockholm 2 nd May 2011, Transport Expert Panel Dr. Sophie Hoehn, Federal Office for the Environment FOEN, Division for air pollution control and NIR Development of transport related PM10-emissions in Switzerland

4. 4 Non-exhaust PM10 emission factors for road transport| TFEIP/EIONET Meeting Stockholm 2 nd May 2011, Transport Expert Panel Dr. Sophie Hoehn, Federal Office for the Environment FOEN, Division for air pollution control and NIR Exemples of recent studies Switzerland: Abrasion PArticles produced by Road Traffic (APART) 2009 Germany: Reifenabrieb in Feinstaub, 2009 Sweden: Nanowear (2009), WEAREM (2009)

5. 5 Non-exhaust PM10 emission factors for road transport| TFEIP/EIONET Meeting Stockholm 2 nd May 2011, Transport Expert Panel Dr. Sophie Hoehn, Federal Office for the Environment FOEN, Division for air pollution control and NIR Results of APART-Studie Sources of non-exhaust PM10 in Switzerland: Brake wear important on inner urban streets Road surface wear rather negligible (no studded tyres) Tyre wear negligible, > PM10 Resuspension is very important Important differences between inner urban streets and highways

6. 6 Non-exhaust PM10 emission factors for road transport| TFEIP/EIONET Meeting Stockholm 2 nd May 2011, Transport Expert Panel Dr. Sophie Hoehn, Federal Office for the Environment FOEN, Division for air pollution control and NIR Results of APART-Studie

7. 7 Non-exhaust PM10 emission factors for road transport| TFEIP/EIONET Meeting Stockholm 2 nd May 2011, Transport Expert Panel Dr. Sophie Hoehn, Federal Office for the Environment FOEN, Division for air pollution control and NIR Results of APART-Studie

8. 8 Non-exhaust PM10 emission factors for road transport| TFEIP/EIONET Meeting Stockholm 2 nd May 2011, Transport Expert Panel Dr. Sophie Hoehn, Federal Office for the Environment FOEN, Division for air pollution control and NIR Comparision with Guidebook 2009 Guidebook 2009APART Inner urban main road APART Highway Passenger Cars (g/km) Tyre wear } 0.0138 > PM10 Brake wear 0.008 (± 0.004)0.0016 (± 0.0011) Road surface wear0.0075< 0.003n.a. Heavy Duty Vehicles (g/km) Tyre wear } 0.0590 > PM10 !> PM10 Brake wear 0.081 (± 0.039)0.009 (± 0.007) Road surface wear0.03800.007n.a. APART: considerable uncertainties were introduced by splitting the fleet emission factors into vehicle type specific emission factors.

9. 9 Non-exhaust PM10 emission factors for road transport| TFEIP/EIONET Meeting Stockholm 2 nd May 2011, Transport Expert Panel Dr. Sophie Hoehn, Federal Office for the Environment FOEN, Division for air pollution control and NIR Conclusion Guidebook 2009 emissions factors are probably to high concerning road wear in general and brake/tyre wear for interurban roads An update of the guidebook emission factors for non-exhaust PM10 should be considered The introduction of emission factors for resuspended particles should be considered. Specific emission factors for inner urban and interurban roads should be considered.