The Northampton train station's car park is currently the home of a camp of travellers.
Dozens of spaces on the Northampton Railway Station car park are currently taken by up nine caravans and accompanying vehicles.
However, because the car park is private land the travellers are outside of the Northamptonshire County Council's Travellers' Unit's jurisdiction.
The price of a day ticket to use the car park is £9.50.
A spokeswoman for London Northwestern Railway, who controls Northampton Rawil Station, said: “We are working with police and our car park contractor to ensure the situation outside Northampton station is resolved for all parties.
"The car park is for the use of rail passengers and our priority is to continue to provide a service for them. We have increased patrols of the car park for the peace of mind of our customers, should anyone be concerned about the current proximity of the temporary traveller base.”