Due to the increased traffic intensity on the E22 highway and limited possibilities to broaden the road, a new solution needed to be drawn up to ensure the flow, safety, and environmental concerns. A large aquifer in the area supplied the surrounding municipalities with drinking water which needed to be dealt with carefully. Protecting the groundwater and finding the most efficient solution was paramount.
The outcome of the subsurface mapping resulted in positive results from both a financial as well as environmental perspective. The survey showed that a thick clay layer above the bedrock would act as protection for the underlying aquifer. For most parts of the 16 km potential road section, no additional protection was required. The outcome and analysis of the survey delimited the need for water protection work. The monetary saving was estimated to 50 MSEK ($5.6) together with the environmental savings.