Police were called about 10am to a reported assault in a car park outside a Crawford St auto parts store.
Speaking to the Otago Daily Times at the scene, the alleged victim said he was driving north on the Southern Motorway near Lookout Point, when he changed lanes.
While he denied cutting anyone off, he said the manoeuvre evidently angered the driver of a large brown motorhome, which began following him close behind as the pair travelled towards Dunedin.
"He was on my arse all the way into town."
The driver said after both vehicles stopped in the Repco car park, the man in the motorhome exited his vehicle, walked up to his car and began filming with his cellphone, all the while remonstrating with him.
The motorhome driver then allegedly punched the man in the face. The man said he backed off, not wanting a fight.
"I don’t retaliate these days. It wouldn’t be a good fight."
He did not appear to have been injured.
After this, the motorhome driver left the scene as police were being called.
While two officers were interviewing the driver and a witness, the motorhome returned to the scene, and the alleged assailant spoke to police.A police spokeswoman said that the driver of the motorhome was warned for threatening behaviour.
• Dunedin police (03) 471-4800, Crimestoppers 0800 555-111.