1.A.3.b vii - Road Transport: Automobile Road Abrasion

Last updated on 03 Apr 2020 13:11 (cf. Authors)

Short description

In sub-category 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 Category 1
1.A.3.b vii Automobile road abrasion T1, T3 NS, M CS L & T: TSP, PM2.5, PM10


Abrasive emissions from tyre and brake wear are estimated based on vehicle-type specific mileage data.

For detailed mileage data, please see superordinate chapter.

Emission factors

The tier1 emission factors used here have been derived from the 2019 version of the EMEP/EEA air pollutant emission inventory guidebook. [1]

Table 1: Default tier1 emission factors applied
Vehicle Type PCs LDVs HDVs Buses MTWs1
Particulate Matter, in [mg/km]
BC 0.00 0.00 0.00 0.00 0.000
PM2.5 4.05 4.05 20.5 20.5 1.62
PM10 7.50 7.50 38.0 34.2 3.00
TSP 15.0 15.0 76.0 76.0 6.00
Priority Heavy Metals, in [µg/km]
Pb 0.062 0.062 0.312 0.062 0.025
Hg 0 0 0 0 0
Cd 0.003 0.003 0.016 0.003 0.001
Other Heavy Metals, in [µg/km]
As 0.0390 0.0390 0.198 0.039 0.016
Cr 1.08 1.08 5.47 1.08 0.432
Cu 0.037 0.037 0.186 0.037 0.015
Ni 0.570 0.570 2.89 0.570 0.228
Se 0 0 0 0 0
Zn 1.29 1.29 6.54 1.29 0.516

Discussion of emission trends

NFR 1.A.3.b vii - Emissions from road abrasion is key category for emissions of PM2.5, PM10 and TSP regarding these emissions' 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 emissions from road abrasion is similar to the trend for total driven mileage.


Activity data (mileage) have been revised due to the regular revision of the TREMOD model. (see superordinate chapter).

However, the biggest changes occur in the tier1 emission factors that have been revised fundamentally in order to be in line with the tier1 defaukt values provided in the EMEP/EEA Guidebook 2019. [((bibcite [((1))]
Unfortunately, the variety of old and revised emission factors cannot be compared here in a comprehendible way.

For more information on recalculated emission estimates for Base Year and 2017, please see the pollutant-specific recalculation tables following chapter 8.1 - Recalculations.

Planned improvements

Besides the routine revision of the TREMOD model, no specific improvements are planned.

1. EMEP/EEA, 2019: EMEP/EEA air pollutant emission inventory guidebook 2019; https://www.eea.europa.eu/publications/emep-eea-guidebook-2019; Copenhagen, 2019.
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