Brigg level crossing is to be closed to road traffic for up to 10 hours.
The crossing, where Bigby Road meets Bigby High Road on the A1084, will be shut overnight on May 23. Further details to follow.
Hibaldstow level crossing, on the B1206, will see an overnight closure on June 19.
There will be a similar closure on July 24 on Caistor Road, Melton Ross.
Diversions will be indicated during these closures to assist motorists.