As an alternative to avoid the myriad of traffic lights on Hotel Plaza/Buena Vista Blvd that are not synched and you will end up having to stop at nearly all of them; you can stay on 535 for about a mile and a half and then turn right at the light for 536 which turns into Epcot Center Drive and just follow the MK signs. This way actually is faster and has less traffic. I think Disney deliberately makes the lights on Buena Vista Blvd not synch up in order to keep traffic off that route. An alternative and the fastest way would be to get on the I4 West entrance ramp and just stay on the entrance lane, it turns into the exit lane for Epcot Center Drive; you are on the interstate for about a mile and you never have to change lanes, the exit signs will say it is for Epcot but once on Epcot Center Drive it very easy to follow the signs for the MK. If you follow the interstate exit directory signs for the MK they have you go about 3 miles south to the 192/World Drive exit; this is the original entrance to WDW; they keep the signage the same in order to keep traffic flow even between the various parks.
