Written By: Bitumen, dense, highly viscous, petroleum-based hydrocarbon that is found in deposits such as oil sands and pitch lakes (natural bitumen) or is obtained as a residue of the distillation of crude oil (refined bitumen).
  About 3.5 hours-maybe 4 depending on road construction. The hardest part is getting out of Miami to Key Largo-then it's a 2 lane highway through all the keys to Key â¦ West with alot of traffic lights in between. If you are coming from Miami-definitely take the toll road.
On the route between Miami and Key West, there are four stops where tickets may be purchased -- Key Largo, Islamorada, Marathon and Ramrod Key. Signs along Route One designate additional stops at Tavernier, Layton, the Marathon Airport, Big Pine, Cudjoe Key, Sugar Loaf, Big Coppitt and Boca Chica.