A cargo carrier for the roof top of a vehicle includes a housing, a center module, and an end module, and the center and end modules have a retracted position within the housing. The end module extends away from the center module to expand the cargo carrier in a partially expanded position, while the center module also extends away from the housing, and along with the previously extended end module, forms a fully expanded position of the cargo carrier. A telescoping assembly along with telescoping rails which coordinate to operate simultaneously to move the center module and the end module into the retracted position within the housing, as well as into the partially expanded position, and the fully expanded position outside of the housing.