PAVE THE GRAVEL TRAPS
"... Gravel traps on road racing courses should be paved over so drivers can steer, brake and recover... When a driver gets into the gravel, he becomes a passenger, unable to brake or steer." -- John Fitch --
Mr. Fitch, inventor of HANS device, water filled barriers, compression barriers and displacement guardrails
What killed Bianchi was a puddle, not a crane or officers not stopping a race fast enough. It's time to have racetracks without them, I think.
What could have saved Bianchi's life is porous asphalt
However, Andrés, Moose and wrcstl are right: the best thing after an accident has happened (that is, after you lose control of your car) is to crash into something different from a crane or a barrier a few meters away from the road.
Nonetheless, that's not the same as avoiding the accident in the first place, which is the preferred course of action in highway security analysis.