Additional surrounding counties, known as outlying counties, can be included in the CBSA if these counties have strong social and economic ties to the central counties as measured by commuting and employment.
Hai condados circundantes adicionais, coñecidos como condados periféricos, que poden ser incluídos no CBSA se estes condados teñen fortes lazos sociais e económicos cos condados centrais, medidos polo nivel de desprazamentos e o emprego.