Metingen van luchtverontreiniging aan de A28 bij Zwolle in de periode van 18 oktober t/m 4 november 1999

Abstract

Concentrations of nitrogen oxides, nitrogen dioxide, carbon monixide, sulfur dioxide, volatile organic compounds, fine particles and black smoke were measured along the A28 motorway near Zwolle from October 18 to November 4, 1999 to determine the current state of air pollution along this road before the planned reconstruction. In the near future, six lanes will replace the present four lanes comprising this marked-out section of road and the speed limit here will be 70 km h-1. Homes and office buildings will be built at distances up to close to the road. In addition to the measurements, calculations were made using the CAR model. Pollutant concentrations were calculated for both the current situation and future scenarios with respect to the reconstruction of the road, traffic development and expected reductions in air pollution due to vehicle emissions. The effects of the above modifications on the exposure to air pollution of the future population living and working here, and the possible health risks related to this exposure, were estimated using the results of both the measurements and model calculations. The health risk guidelines for carbon monoxide, sulfur dioxide and volatile organic compounds were shown not to be exceeded, while the guidelines for nitrogen dioxide, fine particles and black smoke could be exceeded, depending on future development. The air pollution near the motorway is comparable to the city background level except for black smoke, for which concentrations on the motorway are much higher than at city background sites and even comparable to the level in very busy streets.