AN ALTERNATIVE ROAD CONSTRUCTION FOR STORMWATER INFILTRATION IN A COLD CLIMATE / Alternativ gatukonstruktion för dagvatteninfiltration i kallt klimat

By using an alternative road construction with permeable asphalt over an open-graded aggregate base the stormwater is infiltrated into the ground. No regular stormwater pipes and manholes are needed A full scale study of an alternative road construction in a cold climate is presented in this article. Two roads in a housing area in Luleå, Sweden were rebuilt in 1993. The construction costs for an alternative road construction and a conventional road construction were comparable.

Stormwater runoff, groundwater levels, frost heave and frost penetration have been studied The runoff reduction during the snowmelt period was 50-60 %. Frost heave was uniformly distributed over the road surface. No damage caused by frost heave was observed. The type of asphalt, permeable or impervious, did not influence the frost penetration