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Noise monitoring results 2000

Monitor resultaten geluid 2000


As part of an enhanced effort in monitoring the environmental quality in 1999, the RIVM set up a noise monitoring programme. This programme forms part of the project, "Development of a monitoring system for noise and disturbance", which aims at establishing a number of permanent sites for monitoring the trends in noise levels for large-scale sources such as roadways and railways. In the framework of the programme for 2000 continuous noise measurements were made on a number of specific sites. These would serve to support and validate models used in policy studies. Measurements were taken and analysed using the results of a feasibility study which had been conducted in 1999 along the A2 roadway near Breukelen. Here, the results of the measurements, including the analysis, are given for this site in 2000. The measurements were combined with traffic volume figures in order to determine the source strength of different vehicle categories. The results of a feasibility study for conducting similar continuous noise measurements on two other sites are also presented here. One site was found near Breukelen along the railway line between Utrecht and Amsterdam. The aim was to monitor the trend in noise emissions from railway stock. The other was set up in a sanctuary at Zegveld. At the measurement site along the A2 highway near Breukelen, yearly averaged sound power level of 106.7 dB(A) for passenger cars and 110.3 dB(A) for freight cars were found. These results are consistent with data from standard noise calculation models. A temperature effect was also found: i.e. the noise levels in winter were approximately 3 dB(A) higher than in the summer. The pilot study at the site along the railway between Utrecht and Amsterdam near Breukelen indicates that monitoring noise levels along railway lines by means of continuous measurements offers the possibility of keeping emission data up to date, checking model predictions and evaluating the long-term effect of policies regarding noise emission limits. Therefore monitoring will be continued in 2001, with additional inquiry into the possibility of distinguishing results according to train category. In the year 2000, an average noise emission level of approximately 64 dB(A) for one railway carriage per hour was set as the standard, being valid for daytime, evening and night-time. The pilot measurements at the Zegveld sanctuary were difficult to interpret and could not be clearly compared to model parameters and model predictions. This site appeared to be unsuitable for monitoring purposes, and for this reason, the measurements at this location will not be continued.

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