Edge cracks are a common problem in asphalt pavement. Edge cracks are longitudinal cracks that form about on the outer edges of pavement. They are mostly caused by heavy traffic near the edge of the pavement, poor drainage, and asphalt shrinkage. The best way to fix edge cracks in asphalt is to make sure your driveway has good drainage and to apply a new layer of sealcoating to protect it from further damage.