A large piece of of concrete has fallen into the middle of one of Tauranga's busiest highways.

The concrete wall which fell from a truck on Hewletts Rd this afternoon. Photo/Aimee Lennan
The concrete wall which fell from a truck on Hewletts Rd this afternoon. Photo/Aimee Lennan

Police are at Hewletts Rd where a large chunk of pre-fabricated concrete fell from a truck about 4pm.

A bystander said he heard a ''massive bang''.

He estimated the concrete weighed about 20 tonnes.

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The concrete fell on west bound lane of the Jean Batten Drive intersection and has been cordoned off by police.

A man who works nearby said he and his workmates had been sitting in their tearoom when they felt a large thud.

''It felt like a small earthquake,'' he said.

The man, who would not be identified, said they didn't realise what had happened until traffic began to built up.

Traffic was backing up and motorists are advised to avoid the scene for now.

A reporter at the scene said a large crane was being used to hoist the slab onto a truck.

Traffic was down to one lane but still flowing, he said.

Men at the scene where a large concrete wall fell off a truck on Hewletts Rd at Mount Maunganui. Photo/Paul Jackson
Men at the scene where a large concrete wall fell off a truck on Hewletts Rd at Mount Maunganui. Photo/Paul Jackson