A man is in hospital after a collision occurred in Windsor Terrace in Sunderland - not on the A690 as previously thought.
The road is currently closed from the B1286 City Way (Herrington Interchange) to North Moor Lane.
The A690 remains open.
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The children on board were from Easingwold School and were travelling along roads affected by heavy rain and flooding after Christmas.
The walls had been closed to the public at the weekend amid fears of a collapse.