Problem The city of San Jose, California, experienced fatigue cracking in sections of roadway dedicated to municipal transportation bus lines. Originally, the blame was placed on low-quality materials in the asphalt composition. It was thought that these poor materials could not withstand the full weight of city buses frequently approaching and stopping in the same areas. Although the city attempted several traditional methods to fix the problem, the failures continued and the costs for repeated overlays and expensive full-depth repairs grew. The city then speculated that it was in fact the weak base and subbase that was contributing to the failure of the pavement and decided to pursue an alternative repair method. San Jose city officials asked URETEK to assess fatigue cracking found

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