A Belgian road-safety group says Tesla’s supervised Full Self-Driving system exceeded posted speed limits and attempted to pass cyclists on roads where overtaking is prohibited during testing around Brussels.

Nonprofit organization Johanna.be evaluated a Model 3 over three days in July, covering approximately 400 kilometers. Its 36-page report examined roads where pedestrians and cyclists face particular risks. The vehicle used FSD version 14.2.2.6 in Standard mode, with the speed offset set to zero and the contextual maximum-speed setting disabled.

Incorrect speed-limit information

On 29 tested road segments with 30 km/h limits, the system exceeded the limit on 16. Its highest speed on those segments averaged 44 km/h. The report also says the vehicle displayed an incorrect higher speed limit to the supervising driver on about 90 percent of the segments examined.

In some instances, the vehicle’s display briefly indicated that it had recognized a 30 km/h sign before switching back to a 50 km/h limit. Johanna.be also tested 12 residential “home zones,” where the limit was 20 km/h. FSD exceeded that limit on five of those segments.

The group noted that the system’s settings can be configured in different ways, making the test conditions relevant to the results. However, the evaluation covered only one vehicle, one software version, and selected roads in Belgium. The findings therefore do not establish how frequently the same behavior occurs across all Tesla vehicles using FSD.

Attempts to pass cyclists

Belgian cycle streets prohibit drivers from overtaking cyclists. During the test, FSD repeatedly attempted to pass cyclists on those roads, with the supervising driver stopping several of the maneuvers.

Johanna.be also credited the system with generally yielding to pedestrians and cyclists and behaving courteously around them. The report nevertheless identifies the incorrect speed-limit displays and attempted passes as specific issues for regulators to review.

Regulatory review requested

The Dutch regulator RDW approved FSD for use in the Netherlands in April, after which Belgium authorized the system. Johanna.be has asked both authorities to reconsider those approvals ahead of a possible October 6 vote concerning use of the system across the European Union.

RDW told Reuters it had received the report and would evaluate it in context. Tesla did not respond to the news agency’s request for comment. Although drivers remain responsible for supervising the vehicle, the report argues that this responsibility is complicated when the system presents a speed limit higher than the one posted on the road.