1.A.3.b vi - Road Transport: Automobile Tyre and Brake Wear

Last updated on 15 Jun 2020 13:34 (cf. Authors)

Short description

In sub-categories 1.A.3.b vi - Road transport: Automobile tyre and brake wear emissions from automobile tyre and brake wear in RT are reported. Therefore, these 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 vi Automobile tyre and brake wear T1, T3 NS, M CS L & T: TSP, PM2.5, PM10, Pb, BC

Method

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 emission factors applied
Source Tyre Wear Brake Wear
Vehicle Type PCs LDVs HDVs Buses MTWs1 PCs LDVs HDVs Buses MTWs1
Particulate Matter, in [mg/km]
BC 1.07 1.69 4.50 4.50 0.552 0.750 1.17 3.265 3.265 0.444
PM2.5 4.49 7.10 18.9 18.9 1.93 2.93 4.56 12.7 12.7 1.44
PM10 6.400 10.1 27.0 24.3 2.80 7.35 11.5 32.0 28.8 3.63
TSP 10.7 16.9 45.0 45.0 4.60 7.50 11.7 32.7 32.7 3.70
Priority Heavy Metals, in [µg/km]
Pb 1.88 2.97 4.26 3.10 0.810 45.5 71.0 199 199 22.5
Hg 0 0 0 0 0 0 0 0 0 0
Cd 0.050 0.079 0.114 0.083 0.022 0.168 0.262 0.734 0.734 0.083
Other Heavy Metals, in [µg/km]
As 0.041 0.064 0.092 0.067 0.017 0.506 0.790 2.21 2.210 0.250
Cr 0.255 0.402 0.576 0.419 0.109 17.3 27.0 75.7 75.7 8.55
Cu 1.86 2.94 4.21 3.06 0.800 383 598 1,674 1,674 189
Ni 0.320 0.505 0.723 0.526 0.138 2.45 3.83 10.71 10.71 1.21
Se 0.214 0.338 0.484 0.352 0.092 0.15 0.234 0.655 0.655 0.074
Zn 79.5 126 180 131 34.2 65.1 102 284 284 32.1
POPs
PCDD/F NA NA NA NA NA NA NA NA NA NA
PAHs, in [µg/km]
B[a]P 0.032 0.049 0.134 0.120 0.013 0 0 0 0 0
B[b]F 0.038 0.063 0.161 0.144 0.019 0 0 0 0 0
B[k]F 0 0 0 0 0 0 0 0 0 0
I[..]P 0.019 0.028 0.082 0.072 0.006 0 0 0 0 0
∑ PAHs 1-4 0.090 0.140 0.379 0.336 0.038 0 0 0 0 0

1 similar EF apllied to mopeds and motorcycles

Discussion of emission trends

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

NFR 1.A.3.b vi - Emissions from Tyre and Brake Wear is key source for emissions of PM2.5, PM10, TSP and Lead (Pb).

All reported emissons from tyre and brake wear are connected directly to the mileage driven by the road vehicles covered.

Particulate Matter - PM2.5, PM10,TSP and BC

Heavy metals - Lead (Pb)

The emissions of heavy metals are as well linked directly to the trend of mileage.

Recalculations

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 default values provided in the EMEP/EEA Guidebook 2019.
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.


Bibliography
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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