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.
Travel thoughts for your from Miami to Key Largo. Driving By Car: If you were in a car and maintained an average speed of 60mph (96 kmh) over the course of your it would take you around 0.85 hours to get from Miami to Key Largo. We've included a few additional estimates below based on different average speeds.