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You are here: Home / Data and maps / Indicators / Exceedances of air quality objectives due to traffic / Exceedances of air quality objectives due to traffic (TERM 004) - Assessment published Jan 2011

Exceedances of air quality objectives due to traffic (TERM 004) - Assessment published Jan 2011

Topics: , ,

Generic metadata

Topics:

Transport Transport (Primary topic)

Air pollution Air pollution

Tags:
transport indicators | transport | no2 | pm
DPSIR: State
Typology: Descriptive indicator (Type A - What is happening to the environment and to humans?)
Indicator codes
  • TERM 004
Dynamic
Temporal coverage:
1999-2008
 
Contents
 

Key policy question: Is the contribution of the transport sector to air quality reducing?

Key messages

The data analysed from selected stations in major urban agglomerations indicate that during the period 1999-2008 mean values of NO2 concentrations at road traffic stations remain relatively stable (trend is smaller than the statistical uncertainty on estimate). An increase is observed after 2003 in the maximum observed concentrations and although a slight reduction is observed in 2007, a further increase is noted in 2008. The background concentrations remain relatively stable throughout the period 1999-2008. For PM10, a slight increase was observed in 2003 in the maximum background concentrations, but these have followed a downward trend since. The trend in the maximum PM10 concentration at traffic stations varies during the period 2002-2008, with a downward trend observed between 2002-2004, an increase in 2006 and a downward trend thereafter. Throughout the period 2002-2007 mean traffic and mean background concentrations remain relatively stable, with a slight downward trend observed in recent years.

NO2 mean and maximum values of annual averages for traffic and urban background stations

Note: Station pairs from capital cities were preferred, but when not available the next largest city for which data was available was chosen

Data source:
Downloads and more info

PM10 mean and maximum values of annual averages for traffic and urban background stations

Note: Station pairs from capital cities were preferred, but when not available the next largest city for which data was available was chosen

Data source:
Downloads and more info

Key assessment

In 2008 road transport still remained by far the largest contributor to NOx emissions in the EEA and the second largest contributor to O3 precursor and particulate formation precursor gases such as CO, NH3, NMVOC. It is also the third largest contributor to PM10 emissions, though it should be noted that the largest part of primary particulate emissions from road transport are PM2.5, where road transport is the second largest contributor. Despite the significant reduction in NMVOC, CO, SO2, NOx and PM10 road transport emissions achieved since 1990 across the EEA, the decrease in emissions does not appear to have a statistically significant influence on the air quality in urban agglomerations and the increase in the number of vehicles is off-setting the technological and fuel quality improvements.

During the period 1999-2008 the maximum NO2 concentration at traffic stations is observed in London, whereas the maximum background concentration is observed in Paris. The maximum PM10 traffic value during 2002-2006 was observed in Rome, but as data from the traffic station was not available in 2007 and 2008 the maximum PM10 traffic value for these years was observed in London. The maximum background concentration during the period 2002-2008 was systematically observed in Prague, with the exception of 2005 when it was observed in Bratislava.

Data sources

More information about this indicator

See this indicator specification for more details.

Contacts and ownership

EEA Contact Info

Cinzia Pastorello

Ownership

EEA Management Plan

2010 2.9.2 (note: EEA internal system)

Dates

Frequency of updates

Updates are scheduled every 1 year in October-December (Q4)
Document Actions

Comments

European Environment Agency (EEA)
Kongens Nytorv 6
1050 Copenhagen K
Denmark
Phone: +45 3336 7100