A broken down tram brought traffic to a standstill for almost two hours in the centre of Edinburgh yesterday.
Around 10 buses were forced to reverse on Princes Street to find an alternative route after police closed the road to westbound traffic..
The chaos comes just over a week before the proposed 31st May launch date.
The incident which happened around 10.30 am at the bottom of the Mound led to congestion with buses being diverted onto St Andrew Square.
Crowds of onlookers gathered as engineers from Spanish firm CAF moved the tram to assess what caused the fault.
The latest breakdown came as Edinburgh Council held an information event to inform passengers about ticket buying with a parked tram open to board in St Andrew Square from noon until 2pm.
Tom Norris, Edinburgh Trams Director and General Manager, said: “ Unfortunately a fault occurred with one of our tram vehicles which led to some traffic congestion on Princes Street for a spell.
“Engineers were on site quickly and the tram was moved to the Princes Street tram stop as soon as possible to allow traffic to flow again. It is now at the Depot so that the fault can be assessed and fixed.
“We apologise for any disruption caused.”