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ECN publication
De run-off kwaliteit van alternatieve vluchtstrookconstructies
Published by: Publication date:
ECN 1-6-2002
ECN report number: Document type:
ECN-C--02-056 ECN publication
Number of pages: Full text:
21 Download PDF  

In October 2001 monitoring of the run-off from emergency lanes of highwayson seven locations in the Netherlands was started. During 4 months the loads of heavy metals (Cr, Cd, Ni, Cu, Pb, Zn) and mineral oil were determined at 2 locations on the A12 near Zevenaar, 1 location on the A6 near Keteldiep and 4 locations on the A7 near Groningen. The aim of the investigation was to determine the influence of the type of emergency lanes: ZOAB 0/16, ZOAB 11/16 and DAB 0/16 on the run-off quality. The conclusion was that the concentration in the run-off of heavy metals and mineral oil is significantly higher for DAB 0/16 than for ZOAB. Generally, the mass-loads for ZOAB are comparable to those found in earlier investigations near Zeist and Spaarnwoude. The loads for DAB are up to about a factor of 10 higher. It appears that the loads of heavy metals and mineral oil are directly related to the amount of sludge in the run-off. No significant influence of different types of ZOAB on the run-off quality was found.

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