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Saint-Isidore english summary

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publié le 24 février 2020

Around 16:50, on Thursday, 29 October 2015, a car-carrying articulated truck traveling on the A8 highway in the direction Italy – Aix-en-Provence, driving on the last part of the Nice Saint-Isidore descent, suddenly lost its braking ability a few hundred meters from the toll.
The articulated truck descended this steep slope zigzagging between the vehicles and arrived at the toll at a speed of around 115 km/h.
As a last minute reaction, he entered a toll lane that seemed to be less busy than the others, hit several vehicles in the line, destroyed the toll barrier structures, lost part of its load and stopped around fifty meters ahead.
This accident took the life of a motorcyclist, caused injuries to eight people, several of them had to be hospitalised for more than 24 hours, and led to significant material damage.

The direct and immediate cause of this accident is the failure of the braking system of the articulated truck in the descent.
Numerous factors played or could have played a part in the occurrence of this accident :

  • the degraded state of the braking system ;
  • the accessibility of arrester beds.

The analysis of this accident led BEA-TT to formulate two recommendations for the ESCOTA company, and one for the Directorate General for Infrastructure, Transport and the Sea (DGITM), regarding the safe distance between heavy vehicles and the signaling of arrester beds.