The road is Western Way. It connects SR429 to WDW. Western Way ultimately connects to Buena Vista Blvd at the CSR.
This is a good way to get to WDW if you are coming from the western part of FL. SR429 connects with the FL turnpike around Ocoee and ends around I4.
The exit on SR429 is well marked for WDW. If you chose Western Way, watch your speed. Most of it is 45MPH but there are several placed where it drops and at those drops, there is usually and OC Sheriff there to enforce speed limits.