Tesla’s Full Self-Driving system frequently exceeded speed limits and attempted to pass cyclists where overtaking is prohibited during testing conducted over hundreds of miles in Belgium by a road-safety advocacy group.

Belgian pedestrian and cyclist safety group Johanna.be tested FSD over three days in July, covering roughly 400 kilometers, or 249 miles, according to Reuters.

The group said it found repeated problems in 20 km/h and 30 km/h zones, including the system displaying incorrect speed limits.

According to the group’s report, FSD exceeded the limit in the majority of 30 km/h, or roughly 19 mph, zones tested around Brussels, traveling at an average speed of 44 km/h, or roughly 27 mph.

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The report said that while the vehicle’s screen showed the system recognized speed-limit signs along the road, it frequently displayed incorrect limits, potentially misleading drivers about how fast the vehicle should travel.

“It is akin to a passenger constantly reassuring the driver that the speed limit is 50 km/h in nearly every 30-zone through which they pass,” the report said.

Videos collected by Johanna.be also reportedly show FSD-enabled Teslas attempting to overtake cyclists on streets where doing so is prohibited, according to Reuters.

Still, the group’s findings were not entirely negative.

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The report noted that Tesla’s system “behaved cautiously and courteously around pedestrians and cyclists, often yielding proactively.”

Earlier this month, Tesla released a study saying that FSD-equipped vehicles do not speed excessively and generally travel at speeds consistent with surrounding traffic.

Xavier Lesenne, spokesperson for the Flemish government’s transportation ministry, which authorized the use of FSD in Belgium earlier this year, described it as “a learning system that continuously processes new and additional information” and adapts over time.

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Lesenne also noted that the driver “remains 100% responsible” and must be ready to intervene “should the system make an error or fail to correctly apply a traffic rule.”

The report comes after Dutch regulator RDW approved the system in April, followed by Belgium and several other countries.

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