Circular road maintenance

Important results from the project

Expected results were an assessment of how investigated alternative, circular materials work for winter road operation in Stockholm municipality. This goal was achieved by testing potassium formate and circular salt in the lab and the former also in the field on cycle paths. The tests showed equivalent or in some investigated situations better function, which provides the conditions for continued trials or use in regular operation.

Expected long term effects

In the long term, the range of anti-icing agents can be broadened based on local needs, where both circularity and care for vegetation can be met without sacrificing accessibility and safety for unprotected road users.

Approach and implementation

The project was carried out according to plan as part screening and laboratory evaluation and part pilot study. These ran partly in parallel. Field studies were carried out on a large scale in both winter season 1 and winter season 2 with winter road operation of cycle paths. Greater emphasis than planned was placed on production process development and laboratory evaluation for one of the materials, while the field trials focused on the material that was available in sufficient quantities.