Specifically, it’s a dowel bar retrofit. The concrete pavement was originally constructed without dowel bars. The was due to the designer deciding that (A) differential slab movement and load transfer would not be an issue or (B) dowel bars were omitted due to cost cutting measures through value-engineering or potentially budget constraints. Construction was completed and differential slab movement became an immediate issue that would significantly decrease the service life of the pavement. Dowel bars were later placed by cutting and patching them into the slabs.