Two trams collided in Rive on Saturday, causing major public transport disruption.
The TPG says a combination of mistakes led to the crash.
The historic green tram was running on a nearby track – which meant the points had to be changed manually.
But a regular tram passed through before the points could be changed back, so it sideswiped another.
Only one person was slightly injured by broken glass.
Emergency measures in place
The record-breaking heatwave is forcing authorities to take emergency measures.
Glacier melt 'alarming'
The glaciers are losing water at an alarming rate as the heatwave drags on.
Too hot for nuclear station
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Massive mudslide hits French hamlet
A torrential mudslide swept through the Haute-Savoie hamlet of Chéron Wednesday night, hitting five of its eleven houses and forcing the evacuation of 21 residents.
Vote to be held on rent controls
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What to tip?
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