The City of St. John’s (Newfoundland and Labrador, Canada) has a unique weather climate, with excessive precipitation year-round, moderate summers and extreme winters. The pavement foundation (subgrade) layer in this region consists mainly of strong metamorphic rocks. Since the city is located in an island and has a small population size, the road pavements of this city experience very low volume of heavy traffic. Despite having less traffic and strong foundation, most of the road pavements in St. John’s suffer serious structural and functional distresses. The distresses include but not limited to deformation (structural, abrasion), moisture damages (pothole, ravelling), fatigue cracking (top down, bottom up), thermal cracking (longitudinal, transverse), etc. These distresses eventually lead to longer travel times, higher vehicular and pedestrian crashes and fatalities, excessive fuel consumption due to additional maneuvering actions as a result of poor road conditions, high CO2 emissions, and a sub-standard ride quality. To address these issues, a comprehensive understanding of these distresses under local conditions is necessary. A detailed field survey for these distresses was conducted; the distresses were classified and ranked based on type and severity. In addition, the summary of each distress mechanism has been presented, followed by some recommendations to mitigate and address these distresses in this region. This study will not only contribute to enhance pavement service-life but also reduce deleterious emissions and improve traffic safety.
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