Long-life Pavements - European & American Perspectives
Prof. László Gáspár – Dr. Zsolt Bencze, KTI (Institute for Transport Sciences Non-Profit Ltd), Budapest, Hungary
The ambition for building long-life pavements (LLPs) of roads is obvious in every country due to the ever-increasing traffic demand and funding constraints. LLP is an efficient way to reach the aimed goals of lower whole life cost and lower user costs (traffic operation cost, time delay cost and accident cost). There are a lot of differences world-wide in the definition of highway pavements of long duration (long-life pavements), however, related to its American equivalent, the “perpetual pavement” – the most widely used versions say: “a perpetual asphalt pavement designed and built to last longer than 50 years without requiring major structural rehabilitation, and needing only periodic surface renewal in response to distresses confined to the top of the surface” [Newcomb, 2002], and “a Long-life Pavement is a type of pavement where no significant deterioration will develop in the foundations or the road base layers provided that correct surface maintenance is carried out” [Ferne et al., 2006]
Road infrastructure investment has increased less in many countries than road traffic. If these trends continue, the outcome will be increasing intensity of road traffic on road networks in the future. These trends support the view that there will be increasing numbers and proportions of roads that are highly trafficked and therefore candidates for more durable pavements at higher construction costs.
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NBM&CW September 2018
