
Portland's (Hippodamian) Grid overlaid on a Virtual Earth bird's eye view of Pearl District. The centre lines of streets intersect at 260 foot intervals.
In an editorial on Planetizen, Fanis Grammenos and Douglas Pollard discuss the downside of the small block grid pattern of Portland.
For reasons of land efficiency, infrastructure cost, municipal expenses, rainwater management, traffic safety and flow, and the demand for increased pedestrian share of public space, the praised, pure Portland platting will likely not find new followers.
Full article: Beloved and Abandoned: A Platting Named Portland | Planetizen.