The A66 in Middlesborough will be closed for four hours after two 40ft long steel pipes came off the back of an HGV.
It's thought a second HGV then crashed into the pipes. No one was hurt.
More top news
Kerrie Gosney brings you Sunday night's forecast
Gates giving access to the walls have been shut between Fishergate Bar and Postern Tower.
Now, the remaining three will battle it out for the title of King or Queen of the Jungle 2016.