Part of a tram network in Birmingham had to be halted after a stranded lorry blocked the tracks, causing disruption for rush-hour commuters.
Midland Metro said the obstruction on Tuesday morning forced the cancellation of services linking central Birmingham with the city's St Chad's tram stop.
The operator of the line said in a statement:
The disruption, predicted to last for several hours, followed two similar incidents in which drivers took wrong turns on to a tram-only section of the network near Birmingham's Snow Hill railway station.
In November last year a motorist who blundered on to the line - causing £6,000 of damage to his week-old Mercedes and five hours of disruption - was handed a 17-month driving ban.
Tram services were also disrupted for three hours last May when a Peugeot 207 was left straddling a raised section of the line near the St Chad's stop.