They are characterized by
grid street plans, higher levels of pedestrianism,
mixed-use, and higher density development. They contrast with the newer low-density developments in the city's
suburbs.
The urban communities tend to be older, predating the present day predominant
car culture. There has been reinvesting in these communities in the late 20th century and early 21st century, after decades of disinterest, resulting in
gentrification and increasing home prices.