Self-Driving Bus Struck by Tram on First Day Carrying Passengers in Sweden

A rocky start in Gothenburg

A self-driving electric bus built by Turkey's Karsan was struck from behind by a tram in Gothenburg, Sweden, on Monday, just over an hour after it began carrying paying passengers. The incident has raised early questions about how autonomous vehicles integrate into complex, mixed urban transit networks.

What happened

The Karsan e-ATAK bus braked while in service and was rear-ended by a tram. No injuries were reported among passengers or bystanders. "The self-driving bus with people onboard in Gothenburg braked and was hit from behind by a tram. There are no casualties or personal damages," said Vasttrafik spokesperson Patrik Chi. The bus was taken out of service for inspection, and the circumstances surrounding the collision remain under investigation. A safety driver was on board at the time, prepared to take control if necessary.

The trial behind it

The collision occurred on the first day carrying paying passengers along a new route, part of a year-long trial of autonomous public transport in the city. The Karsan Autonomous e-ATAK operates at SAE Level 4 autonomy and has been running between Gothenburg Central Station and Liseberg Station along a four-kilometre route with seven stops since September 2025. The project involves Vasttrafik, Vy Buss, and technology partner Adastec. The same vehicle had already demonstrated its capabilities in challenging conditions earlier in 2026, completing a month of commercial passenger service in the Swedish ski resort of Salen, navigating snow and ice.

Why it matters

Even if the crash was caused by the tram failing to stop rather than by an autonomous driving error, the event highlights the challenge of mixing self-driving vehicles with conventional traffic. Autonomous buses may behave differently from human-driven vehicles, braking more cautiously or abruptly and creating situations other road users do not anticipate. As cities across Europe expand trials of driverless public transport, the Gothenburg incident offers an early case study in how these systems interact with legacy infrastructure such as tram networks. The takeaway is less about a single fender-bender and more about the friction that emerges when cutting-edge automation shares the road with decades-old systems and unpredictable human drivers.