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On 12 March 1992, an accident occurred at Vasaplatsen in Gothenburg, Sweden when a tram with disconnected brakes rolled downhill, travelling backwards against traffic along Guldhedsgatan and Aschebergsgatan. Reaching speeds of up to , it ploughed sideways across the Vasaplatsen tram platform, crushing over 50 waiting commuters as well as two cars and their passengers on a parallel road. The accident remains the deadliest in the history of the Gothenburg Tramway, killing 13 people and injuring 42 others.
Course of event Lead-up to the accident The accident originated when a tramway segment used by Line 7 lost power, due to a malfunctioning pantograph that burned an overhead wire near the Medicinaregatan stop. This caused a power outage along an extended section of track. The accident tram, designated tram train number 19 and consisting of the M21 duo-carriage sets 235 and 245, came to a sudden halt near the Wavrinskys plats stop when the outage triggered an automatic brake, partially blocking a roundabout. Shortly after, the driver evacuated the tram to allow passengers to find alternative ways of transport.
As the track behind it belonged to a different segment that was unaffected by the power outage – other trams had begun building a queue and were waiting. A traffic controller began sending these into service one by one by reversing them down Aschebergsgatan Street. An auxiliary switch was set westward towards Vasagatan Street, allowing trams to reverse along Vasagatan Street and then continue eastbound in service towards Valand stop and onwards to the line's terminus Kortedala.
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