So recently Rockstar released two new art pieces featuring Grand Theft Auto V's main characters, Franklin and Micheal. The illustration depicts how you'll be able to get things done in the game world where Franklin is escaping with the cash via land and Franklin via sea.
Of course this doesn't mean there won't be other forms of transportation as we've seen with previous entries into the Grand Theft Auto series. You can grab the artwork and many others from Rockstar Downloads.
See both artworks below!