Rock Region Metropolitan Transit Authority, is the largest transit agency in Arkansas. It was formerly known as the Central Arkansas Transit Authority. Rock Region Metro provides public transportation services within Pulaski County, Arkansas, seven days a week.

Pulaski County is a county in the U.S. state of Arkansas. With a population of 399,125 as of the 2020 United States Census, it is the most populous county in Arkansas. The county is included in the Little Rock–North Little Rock–Conway metropolitan area. Its county seat is Little Rock, which is also Arkansas's capital and largest city.