1.A.3.b.vii Emissions from Road Abrasion

Last updated on 04 Dec 2014 08:38 (cf. Authors)

Short description

In sub-categories 1.A.3.b vii - Road transport: Automobile road abrasion emissions from road abrasion in Road Transport are reported. Therefore, this sub-category is an important source for a) particle emissions and b) emissions of heavy metals, POPs etc. included in these particles.

NFR-Code Name of Category Method AD EF Key Source for (by1)
1.A.3.b vii Automobile road abrasion T3 NS CS PM2.5 & PM10 & TSP (L)

1 T = key source by Trend / L = key source by Level


Activity Data

For detailed mileage data, please see superordinate chapter.

Emission factors

The tier1 emission factors used here have been derived within a literature study in 2006. During this study, average amounts of particulate abrasion per km and average contents especially of heavy metals in road surface were derived.

\begin{gather} EM(PM)_\text{ annual, type of vehicle} [kg] = ØEM(PM)_\text{ per km, type of vehicle} [kg/km] \cdot Mileage_\text{ annual, type of vehicle} [km] \end{gather}
\begin{gather} EM(HM)_\text{ annual, type of vehicle} [kg] = EM(PM)_\text{ annual, type of vehicle} [kg] \cdot ØContent(HM)_\text{ road surface} [kg/kg] \end{gather}

EF used for emission estimates 1990(1995)-2012

Table: Overview of tier1 EF used for emissions from road abrasion

Material Road Abrasion
Vehicle type PCs LDVs HDVs Buses Two-wheelers
Particulate Matter [mg/km]
PM2.5 4.050 4.050 20.520 20.520 1.620
PM10 7.500 7.500 38.000 34.200 3.000
TSP 15.000 15.000 76.000 76.000 6.000
Heavy Metals [µg/km]
Priority HM
Pb 0.062 0.062 0.312 0.062 0.025
Hg 0.000 0.000 0.000 0.000 0.000
Cd 0.003 0.003 0.016 0.003 0.001
Other HM
As 0.039 0.039 0.198 0.039 0.016
Cr 1.080 1.080 5.472 1.080 0.432
Cu 0.037 0.037 0.186 0.037 0.015
Ni 0.570 0.570 2.888 0.570 0.228
Se 0.000 0.000 0.000 0.000 0.000
Zn 1.290 1.290 6.536 1.290 0.516

Trend discussion for Key Sources

NFR 1.A.3.b vii - Emissions from road abrasion is key source for emissions of

  • PM2.5 regarding level,
  • PM10 regarding level,
  • TSP again regarding level.

Particulate Matter - PM2.5, PM10 & TSP

(from wear/abrasion only; no fuel combustion included)

Emissions from road abrasion are directly linked to driven mileage. Thus, the overall trend of total PM2.5 and PM10 as well as TSP emissions from road abrasion is similar to the trend for total driven mileage.

In the same way, the changes within the emissions from passenger cars, heavy and light duty vehicles, buses or mopeds & motorcycles correlate with those for the mileages driven by these types of road vehicles.


Recalculations were carried out due to a regular the revision of the TREMOD software, resulting in slight changes in mileage data for 2004-2011 (see superordinate chapter).

In contrast, tier1 emission factors remain unchanged compared to submission 2013.

For pollutant specific information on qualitative and quantitative impacts on 1990 and 2011 emission estimates see chapter 11. Recalculations and the following chapters.


Uncertainty estimates for activity data of mobile sources derive from research project FKZ 360 16 023: "Ermittlung der Unsicherheiten der mit den Modellen TREMOD und TREMOD-MM berechneten Luftschadstoffemissionen des landgebundenen Verkehrs in Deutschland". For detailled information, please refer to the project's final report here (German version only!)

Uncertainty estimates for emission factors were compiled during the PAREST research project. Here, the final report has not yet been published.

Planned improvements

At the moment, no category specific improvements are planned.


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