Grid intensification refers to the reduction of block size to reduce mean distance from all points to all others in a space network. It is typically found in city centres where commercial activity has grown to the extent it starts to spread around the block. (See: Centrality as a process).
Hillier,B. (1999), Centrality as a process: accounting for attraction inequalities in deformed grids. Urban Design International , 4 (3/4) 107 – 127. pp.117