Small scale trials and laboratory research prove conclusively that plants can lead to reductions in particulates in air, as well as reduced loads of NO2, ozone and other pollutants associated with premature death and serious illness, as well as global climate change. Now, for the first time in Holland, a full-scale field trial is underway to determine if, in practice, vegetation can be applied to roadside situations to bring about direct and measurable improvements in air quality.

The A50 motorway links Arnhem and Nijmegen in the East of Holland and the research is taking place near Valburg, approximately mid-way between the two. It is seen as an ideal site for study, as traffic loading is heavy and there are few external factors that could influence the results.

Two trail sections of roadside are to be planted with coniferous and broad-leaved trees, each 10 x 100m. The relative properties of these trees in capturing particulates and NO2 will be measured. A third trial section without trees or plants will be monitored as a control.

This project is being carried out as part of an ‘Innovation Programme for Air Quality’ which is supported by several Dutch ministries, including Traffic and Water Management, Housing, Town and Country Planning and Environment.
The Innovation Program stimulates the development of innovative ideas and solutions which will contribute to the improvement of air quality on and around motorways. It forms part of a wider strategy of the Arnhem-Nijmegen region to improve air quality and take steps to counteract the effects of climate change.

Watch this space for more information...