Trust's plan for free hospital car parking
Northern Lincolnshire and Goole NHS Foundation Trust plans to introduce free car parking for some patients at its hospitals.
The trust said the measure would apply to those who attended hospital more than eight times in 30 days.
Concessions for parents visiting sick children may also be put in place.
The trust operates hospitals in Grimsby, Scunthorpe and Goole. The proposals will be discussed by its governor in January.
Car parking at the sites currently costs up to £3.