World Travel City Photography

Grid plans were popular among planners in the 19th century, particularly after the redesign of Paris. They cut through the meandering, organic streets that followed old paths. The United States imposed grid plans in new territories and towns, as the American West was rapidly established, in places such as Salt Lake City and San Francisco.
Other forms may include a radial structure, in which main roads converge on a central point. This was often a historic form, the effect of successive growth over long time with concentric traces of town walls and citadels. In more recent history, such forms were supplemented by ring-roads that take traffic around the outskirts of a town. Many Dutch cities are structured this way: a central square surrounded by concentric canals. Every city expansion would imply a new circle (canals together with town walls). In cities such as Amsterdam, Haarlem, and also Moscow, this pattern is still clearly visible.