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Four-time world champion Alain Prost says he is livid with the circumstances surrounding Jules Bianchi's accident at the Japanese Grand Prix.

Bianchi remains in a critical but stable condition in a Japanese hospital with severe brain trauma suffered after colliding with a recovery vehicle in the wet at Suzuka. The truck was recovering Adrian Sutil's Sauber when the accident occurred, with only double-waved yellows being used rather than a safety car to slow the race to a crawl, something Prost cannot understand.

"I don't want to make any polemics with the FIA, because I have a lot of respect for what has been done in terms of safety over the past 20 years," Prost said. "It is cars and tracks [that have been improved] and there was only one thing left: it was this fucking truck on the track. I was furious. I was really shocked by the accident.

"You have the procedure, but the weather conditions were getting worse and worse with more and more water, so visibility was very bad. So you cannot have the same decision according to the procedure if the weather was good or bad. That is why I say I am not convinced. In this condition, especially with all the experience they have in terms of safety, they should have zero risk."

While Prost agrees there was a huge element of bad luck in Bianchi's accident he also thinks it would never have happened if there were different rules in place regarding recovery vehicles.

"It was safe in the beginning when it started with the safety car, because it was a difficult decision to stop the race after three/four laps and start again. That is why I was shocked, because you take the right decision at one stage.

"It is huge bad luck, but you should not judge the cause of the accident, you should judge the consequence. You don't want to have that. If it was my son, I wouldn't want this type of accident with a truck on an F1 track. That is what I cannot accept."

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