The Asphalt Pavement Alliance has announced the winners of its 2011 Perpetual Pavement Awards program.

These national awards are given to road-owning agencies for asphalt pavements that are at least 35 years old and have never had a structural failure.

The average interval between resurfacing of each winning pavement must be no less than 13 years, and the road must demonstrate excellence in design, quality in construction and value for the traveling public.

A perpetual pavement is constructed so that distress occurs in the top layer only. The only rehabilitation required is the removal of the distressed surface layer and resurfacing with an asphalt overlay.