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Tesla's supervised self-driving system often misreads speed limits, Belgian safety group finds

Johanna.be said Tesla’s system averaged 44 km/h in 30 km/h zones and wrongly showed 50 km/h limits to drivers.

  • The Belgian group Johanna.be reported that Tesla's FSD system frequently exceeded speed limits and attempted to overtake cyclists on prohibited streets during July tests covering about 400 km .
  • Testing revealed FSD often exceeded speed limits in 30 km/h zones, averaging 44 km/h, and frequently displayed an incorrect 50 km/h limit, misleading drivers about safe speeds.
  • While the system "behaved cautiously and courteously around pedestrians and cyclists," the Johanna report concluded these benefits "do not offset the documented failures to comply with speed limits and cycle-street regulations."
  • Xavier Lesenne, spokesperson for the Flemish government's transportation ministry, stated the system is "a learning system that continuously processes new and additional information" and the driver "remains 100% responsible" for intervening.
  • With an EU-wide vote potentially scheduled for October 6, the NGO urged regulators to reassess approvals, while Tesla released a study earlier this month claiming FSD-enabled Teslas "do not speed excessively.
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  • 78% of the sources are Center
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Reuters broke the news in London, United Kingdom on Wednesday, September 23, 2026.
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