Ballarat Police have re-opened the west-bound lane of the Western Highway.
The road was closed for about an hour between 3.30pm and 4.30pm.
Ballarat Police Sergeant Nathan Gardiner said a car towing a caravan had overturned and lost control.
Police said the driver had not sustained any injuries.
THE west-bound lane of the Western Highway in Mitchell Park is closed after a single-vehicle accident this afternoon.
The incident occurred about 3.30pm when a car towing a caravan lost control and crashed on the highway.
Police said the west-bound lane of the highway was blocked, but could not confirm whether the east-bound lane had been affected.
More to come.