There are a couple of very tight turns under brakes you must make to slip through the gap at the rhino blockades at the start of the escape and at the beginning of the freeway so make sure you are lined up perfectly or you WILL crash.
The most technical section is shown of how I drive through the bus station. It is the quickest way through the section of the escape. Master it and it will save you time.
Aim to complete in under 4m20s (without powerups).