Parking charges have been reintroduced at hospitals in Boston and Grantham after visitors faced weeks of problems.
United Lincolnshire Hospitals Trust (ULHT) partnered with ParkingEye to introduce a new automatic number plate recognition system in November 2018.
But broken machines, faulty systems and long queues of people trying to pay meant that fees were waived by the hospitals.
Boston Pilgrim Hospital started charging for parking on Tuesday, January 8 while Grantham and District Hospital will start charging on Wednesday, January 9.
Due to a technical glitch parking will continue to be free at Lincoln County Hospital until later this month.
Paul Boocock, director of estates and facilities at ULHT, said: “Over the last few weeks we have been working with our car parking provider to improve the signal between the ANPR cameras and the pay machines.
“We have experienced a technical delay at Lincoln County Hospital and we will let people know when we are ready for the parking charges to be reintroduced.
“Most of the additional payment machines have been installed, along with all of the extra lighting and we are still putting up shelters around some of the machines. We will also have additional staff on hand to help when the charges are reintroduced at each site.
“I’d like to thank everyone for their patience and support over the past month and also apologise for any inconvenience it has caused.”