No, OKW and SSR each has their own bus system.
At OKW the usual route is Peninsular Road, South Point, Old Turtle Pond, Miller Road and HH before leaving the resort. Buses returning from DD will also stop at HH first and will be noted as "Internal" - then going to Miller, Peninsular, South Point and Turtle Pond before returning to HH and then back to DD.
At SSR, the buses go to Grandstand, Carousel, Paddock, Congress Park and then Springs. There is also a bus from THV to the Springs.
Enjoy!