CARS aren't the only things on four wheels to watch out for in the Kmart car park in Blacktown.
Trolleys are also a hazard, as Janet Wilkinson recently discovered.
One caused significant damage to her car after it rolled down the sloping car park while she was in Kmart briefly on the night of July 10.
Ms Wilkinson wants trolley bays throughout the car park.
The only way shoppers can secure trolleys is if they are at the front of the store.
Kmart leases the land jointly owned by Westpoint and Blacktown Council.
"Kmart managers told me it's been a problem for 25 years," Ms Wilkinson said.
"This could have happened to anybody. One of these trolleys could cause injury to a small child or elderly person. It's an accident waiting to happen in a busy part of Blacktown."
Ms Wilkinson wants compensation.
"The council said it couldn't do anything and that it wasn't their problem," she said.
"If council provides the parking, it should be doing something about it. Someone could end up in hospital one day."
Westpoint centre manager Amanda Johnson urged people to put trolleys in facilities provided. "Trolley bays are installed to provide customers the convenience of returning their trolleys while they await collection," she said.
"Trolley collection contractors engaged by Kmart service the car park regularly throughout the day to ensure they are returned to the appropriate place."
A Blacktown Council spokeswoman said: "Council officers are currently investigating the issue of stray trolleys within the Kmart car park in Blacktown and will contact Ms Wilkinson to provide information."
■Have you had a similar experience? Comment at blacktownsun.com.au.