Not every card is pristine or mint. When flaws are inevitable, collectors are left to decide which imperfections matter most. Centering, corners, edges, and surface are the four areas grading ...

Geopier Foundation Company has introduced its newest Intermediate Foundation® solution: the GeoSpike℠ System—“a low‐cost method for strengthening weak railroad track subgrades without removing ...

Regardless of how much experience an equipment operator has, it is difficult to achieve uniform compaction over a sizable area without the help of technology. Without technology, equipment operators ...

Mansour Solaimanian receives funding from Pennsylvania Department of Transportation. In the past has received research funding from Federal Highway Administration and Wisconsin Department of ...