You can also take toll road 417 directly from the World which spills into the Beach Line (yep, it used to be called the Bee Line) east of the airport.
For some reason I still prefer to take free 4 up to the Beach Line..it just seems faster, but I can't tell ya why. I do get frazzled stopping every 10 seconds to throw money into that dern bin tho...Beach Line is cheaper by a bit than 417, but either way it is an easy drive....oh, I noticed that people driving from Cocoa to Orlando drive WAY FAST and creep up on your butt and high beam you when you are going 80.