NOₓ, PM10 and Heavy Metal Emission Factors Based on Current Tunnel Measurements (Poster Presentation)

Authors

Dr. M. Hinterhofer, Ao.Univ.-Prof. Dr. P. Sturm, Ing. T. Nöst, Graz University of Technology

Year

2015

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 783

Summary

Due to persisting high particulate matter concentrations in areas of Austria the determination of the influence of specific sources gains more and more importance. To improve the appraisal of traffic concerned PM₁₀ and NOx current fleetspecific emission factors were determined in the Plabutsch Tunnel. It has been shown that, especially in relation to PM₁₀ non-exhaust, driving in tunnels leads to a significantly reduced amount of emissions, compared with field routes. For this reason, much lower emission factors have to be set for road sections in tunnels. Due to the length and traffic density in Plabutschtunnel a decrease in PM₁₀ emission rate can be observed at high transport speeds. Taking this observation into account and adapting the regression model using an interaction term (amount_PC × amount_HGV) this term receives a negative value for the measurements in 2012. Within the measurements in 2013, the implementation of the interaction term does not change the emission factors for both passenger cars (PC) and trucks (HGV). So the interaction term is negligible. Comparing the measured NOx emission factors with those from the model calculation using the Handbook Emission Factors (HBEFA 3.1) there is an underestimation by the model observable. Especially concerning the heavy goods vehicles and based on this specific driving situation (Highway 100 km/h). The measured heavy metal loads in the dust are low due to the very smooth driving behavior in the tunnel.