Grid plan

The grid plan is a type of city plan in which streets run at right angles to each other, forming a grid. These are extremely common in towns of the 18th century or later, which have often been created as part of a city plan, such as the New Town in Edinburgh, or the many towns and cities in Australia, the United States or Canada. Older "new" towns such as those in New England are much less likely to use a grid plan. Often, some of the streets in a grid are numbered (First, Second, etc.), lettered, or arranged in alphabetical order. (Washington, DC has examples of all three, although the alphabetical streets arguably are too far out to be part of the street grid there.)